| Power supply information |
|---|
|
Last updated: July 15, 2008
Altogether about the different PC mogul supply cables and connectors
The various power supply cables
General info
If you'd like Thomas More technical data about ATX power connectors then you terminate observe the occurrent specifications and more at formfactors.org
Wires and connectors are not mint conductors. They suffer resistance. When current passes through wires and connectors there is a voltage drop and that energy is lost Eastern Samoa heat. As long American Samoa you don't overload them the voltage drop and extra heat don't matter. But the losses relapse as the current rises. That's why you imag several power cables with more that one cable for the same voltage. Having six-fold wires reduces the losses. If you seriously overload a line, the telegraph can get within reason warm. The resistance of connectors tends to increase as they are plugged and unplugged so after enough uses they can overheat and even thaw when passing a galactic current. Thusly a lot of changes in connectors finished time has to act up with adding more wires and connectors to make sure that none of these problems occur.
Some of the tables below provide the maximum wattage supported by a power cable and its associated power connector. Some specifications clearly spell unsuccessful the maximum allowed wattage. Past specifications just provide the suggested connector and wire gauge and ne'er define a maximum wattage. And in that respect's ne'er really an absolute value to the maximum electric power anyway. If you draw a dinky more wattage then the maximum, the hardware doesn't directly burst into flames. The voltage overlook and power dissipation increase as you addition the stream so there isn't a clear maximum wattage at which it stops working. Most of the specifications which spell out the maximum wattage allow for a wide safety device margin past defining a prise which is far below the maximums supported away the connexion and conducting wire. If the table below provides an "Official cable length/connector maximum wattage" then that specification has spelled out the upper limit wattage. In most cases that electrical power volition be significantly below what can in reality be handled by the suggested connector and wire. If the mesa provides an "Unofficial cable/connector maximum wattage" then that specification doesn't provide the level bes and the value in the table is a practical maximum wattage defined by the maximums for the connection and the suggested conducting wire. An unofficial electrical power doesn't have a inaccurate safety gross profit margin built in because people differ along how much allowance to provide. Some people happily use connector and wire maximums and otherwise people like to have a fanlike safety margin.
| Power connectors enclosed with various kinds of PCs | ||
|---|---|---|
| Version | Introduction date | Included connectors |
| PC | 1981 | original PC important baron cables 4 pin peripheral cable |
| ATX | 1995 | 20 pin main power cable 4 pin peripheral cable floppy cable television service |
| ATX12V 1.0 | 2000 | 20 pin main business leader cable 4 pin 12 V cable 6 pin auxiliary cable 4 fall circumferential wire floppy cable |
| ATX12V 1.3 | 2003 | 20 pin main power cable 4 pin 12 volt cable 6 pin auxiliary cable SATA telegraph 4 pin peripheral transmission line lax transmission line |
| ATX12V 2.0 | 2003 | 24 pin main power cable 4 tholepin 12 volt cable 6 Rowlock PCI Express power line SATA cable 4 pin peripheral cable lax cable |
| EPS12V | 2003 | 24 pin main power cable 8 pin 12 volt cable 6 Pin PCI Express power cable SATA cable 4 PIN number peripheral cable television floppy cable |
| PCI Express 2.0 | 2007 | 24 pin main power cable 4 immobilise 12 V cable 8 pin 12 volt wire 6 Pin PCI Express power cable 8 Pin PCI Give tongue to power cable television service SATA cable 4 peg peripheral cable's length floppy cable |
Original PC chief power cables
The original PC debuted in 1981 and used two cables to connect the PSU (power supply) to the motherboard. The two cables plug side away slope into the motherboard connectors. Sometimes they are keyed so they only plug in one way and sometimes they aren't. Even if they're keyed you can put in them the wrong right smart if you put a trifle effort into IT. You ever have to remember to plug them in so the black wires are adjacent to each other. It's either "black to black" Beaver State smoke and a shower of sparks.
| Pinout | ||
|---|---|---|
| Tholepin number | Telegram color | Verbal description |
| 1 | orange | power good |
| 2 | red | +5 volts or connection key |
| 3 | yellow | +12 volts |
| 4 | blue | -12 volts |
| 5 | total darkness | ground |
| 6 | black | ground |
| 1 | coloured | ground |
| 2 | black | ground |
| 3 | white | -5 volts |
| 4 | red | +5 volts |
| 5 | ruddy | +5 volts |
| 6 | red | +5 volts |
| Connective portion numbers | |||
|---|---|---|---|
| Motherboard connector | Telegraph connector | Terminals | Maximum current per circuit |
| Molex 15-48-0106 | Molex 90331 | Molex 08-50-0276 | 5 amps |
| Unofficial cable/connector maximum wattage delivery for intense track | |||
|---|---|---|---|
| Voltage rail | Number of lines | Maximum current | Maximum wattage |
| +5 volts | 3 or 4 | 15 Oregon 20 amps | 75 or 100 watts |
| +12 volts | 1 | 5 amps | 60 watts |
In old PCs, well-nig all of the chips ran directly off of the 5 volt rail. As a lead the PSU delivers most of its wattage at 5 volts. There are three or four lines dedicated to the 5 V rail in. The other briny rail is 12 volts. That was victimized primarily to run disk drives, motors, and fans. The two negative rails are "bias" supplies which merely have to provide small amounts of current. Retributory for interest's rice beer, here's the specification for the PSU which came with the original IBM PC. It provides a upper limit of 63.5 watts. Boy, those were the days.
| Creative IBM PC power ply | ||
|---|---|---|
| Voltage | Maximum current | Maximum wattage |
| +5 volts | 7.0 amps | 35 watts |
| -5 volts | 0.3 amps | 1.5 watts |
| +12 volts | 2.0 amps | 24 watts |
| -12 volts | 0.25 amps | 3 watts |
4 pin peripheral power line
The four pin peripheral power cable dates backbone to the innovational PC. It was used for diskette drives and hard disks. It's still around and is like a sho also used for all kinds of things including supplement fans, spear carrier video card power, supplemental motherboard baron, and case firing. It's A old as the hills but is still selfsame widely put-upon. The connector is shaped so that it exclusively fits in one way. You wear't birth to worry about inserting it the incorrect style. People often consumption the term "4 PIN number Molex power cable system" or "4 fall Molex" to come to to a four pin peripheral power cable television service. It's not a technically useful term because the 4 personal identification number 12 volt cable is also a 4 pin Molex cable (Molex makes scores of connectors) just "4 pin Molex" is commonly used to pertain to incident cables at any rate.
| Pinout | ||
|---|---|---|
| Pin number | Wire color | Description |
| 1 | yellow | +12 volts |
| 2 | black | ground |
| 3 | black | ground |
| 4 | reddish | +5 volts |
| Connexion part numbers | ||||
|---|---|---|---|---|
| Socket housing | Socket | Pin housing | Pin | Maximum current per racing circuit |
| AMP 1-480424-0 | AMP 60619-1 | AMP 1-480426-0 | AMP 60620-1 | 13 amps |
I don't know of whatsoever official definition of the maximum current allowed in a peripheral cable. The connector rear hold 13 amps according to the manufacturer. Simply you normally find 18 awg conducting wire in the peripheral cables. If you have an 18 inch cablegram (about a half a meter) and are running 13 amps through 18 gauge wire and so you get over a emf drop of about 0.25 volts counting both the power wire and the ground (it's got to go both slipway) and the dissipation is just about 3.3 watts. That's not pleasing. I've just played it safe and listed the supreme current as 5 amps.
| Unofficial cable/connector maximum wattage delivery | |||
|---|---|---|---|
| Voltage rail | Number of lines | Maximum prevailing | Maximum wattage |
| +5 volts | 1 | 5 amps | 25 watts |
| +12 volts | 1 | 5 amps | 60 Isaac Watts |
Current big businessman supplies unremarkably have leastways two separate marginal powerfulness cables, each of which has two Beaver State Sir Thomas More peripheral connectors. When you're plugging in multiple high powered devices information technology's a good idea to spread the warhead between all of your cables. Don't just plug all your devices into one cable unless they'ray comparatively low consignment devices. Spreading the up-to-the-minute between the cables reduces the voltage drops and power departure. If they'ray relatively low up-to-date devices like fans or it's vindicatory a disk take or deuce then it doesn't really topic. But if you'Re putting lots of tall disks into a computer (more or less can pull almost 3 amps at 12 volts when doing some operations) or connecting a video recording card's auxiliary power, then spread the loads between the peripheral power cables. It's also helpful if you use a connector equally close to the PSU as latent sooner than sticking things at the end of the cable. Extra wire sporty means more voltage drop curtain. And if you'atomic number 75 using a encircling connector to PCI Express adapter then be sure to stopper each of the adapter's off-base connectors into a separate PSU cable. They gave you 2 peripheral connectors for a reason. Plugging them both into the equivalent PSU cable forces your video card to draw its 12 volt power through one 18 gauge wire. That increases your voltage drop and world power dissipation in the cable. Some current high-end video cards can suck sprouted Thomas More than 10 amps at 12 volts with most of it advent finished the PCI Express connector sol it pays to represent blow-by-blow. Information technology will probably work if you assume't spread the load but thither's no excuse for not doing it properly. They gave you multiple cables. You might as good use them. Plus there's just something creepy-crawly about having warm wires flatbottomed if they'atomic number 75 not melting.
You will occasionally running game into peripheral connectors which don't have all cardinal wires. They are usually 12 volt only cables intended for fans. Never plug one of those into a disk drive. Drives expect both 5 and 12 volts to be provided. Many of the two-cable off-base connectors are for accelerate-controlled fans. That means that the voltage changes depending on the desired fan hotfoot. The connector will only provide 12 volts when the fan is going full rush along and the voltage decreases to stupid the buff down. Definitely don't plug that united into anything but a devotee! Normally this kind of peripheral connector has "fan" printed on IT to warn you. As long as a peripheral connector has four wires: same fearful, two black, and one red and it doesn't take some rather printed warning attached then it's a standard peripheral cable and you rear wa it into anything.
Floppy drive power cable
The tetrad pin floppy push on cable showed up when PCs started including 3.5 inch lax drives. This gracious of cable is also sometimes used as an auxiliary power line for AGP telecasting cards which use more power than can be drawn from the motherboard slot. The connector is wrought and so that IT only fits in one way so you assume't have to worry just about inserting IT the wrong way. Floppy disk cables are built with small connectors and 20 awg wire so they are limited to relatively low incumbent uses.
| Pinout | ||
|---|---|---|
| PIN number | Wire color | Description |
| 1 | flushed | +5 volts |
| 2 | black | ground |
| 3 | mordant | ground |
| 4 | yellow | +12 volts |
| Connector part numbers | ||
|---|---|---|
| Socket housing | Socket | Maximum stream per circuit |
| AMP 171822-4 | AMP 170262-1 | 3 amps |
| Unofficial cable/connection level bes wattage delivery | |||
|---|---|---|---|
| Emf rail in | Number of lines | Maximum underway | Maximum wattage |
| +5 volts | 1 | 3 amps | 15 Isaac Watts |
| +12 volts | 1 | 3 amps | 36 watts |
6 pin supplemental great power cable
The aux power cable was added to provide extra electric power to motherboards for 3.3 and 5 volts. This connector is rarely used any longer. It's most usually found on older dual CPU AMD motherboards. You're more prospective to sight Bigfoot than a motherboard which uses this connector. Information technology plugs into the 6 pin version of the motherboard connective used away the first PC of import power cables.
| Pinout | ||
|---|---|---|
| Pin number | Wire color | Description |
| 1 | black | ground |
| 2 | black | ground |
| 3 | evil | ground |
| 4 | Orange | +3.3 volts |
| 5 | orange | +3.3 volts |
| 6 | red | +5 volts |
| Connector part numbers | |||
|---|---|---|---|
| Motherboard connector | Overseas telegram connector | Terminals | Maximum current per circuit |
| Molex 15-48-0106 | Molex 90331-0010 | Molex 08-50-0276 | 5 amps |
| Unofficial cable/connector maximum wattage delivery | |||
|---|---|---|---|
| Voltage rail | Number of lines | Maximum current | Maximum wattage |
| +3.3 volts | 2 | 10 amps | 33 watts |
| +5 volts | 1 | 5 amps | 25 watts |
SATA power cable's length
SATA was introduced to upgrade the ATA interface (also called IDE) to a Thomas More advanced invention. SATA includes both a data overseas telegram and a power cable. The power cablegram replaces the centenarian 4 stick fringy cable and adds funding for 3.3 volts (if in full enforced). The connecter is molded so it arse sole be plugged in the counterbalance way of life.
| Pinout | |||||
|---|---|---|---|---|---|
| Personal identification number | Wire enumerate | Telegraph color | Description | ||
| 1 | 5 | orange | +3.3 volts | ||
| 2 | 5 | orange | +3.3 volts | ||
| 3 | 5 | Orange | +3.3 volts | ||
| 4 | 4 | black | base | ||
| 5 | 4 | black | ground | ||
| 6 | 4 | black | ground | ||
| 7 | 3 | cerise | +5 volts | ||
| 8 | 3 | red | +5 volts | ||
| 9 | 3 | red | +5 volts | ||
| 10 | 2 | black | base | ||
| 11 | 2 | black | ground | ||
| 12 | 2 | black | footing | ||
| 13 | 1 | yellow | +12 volts | ||
| 14 | 1 | white-livered | +12 volts | ||
| 15 | 1 | yellow | +12 volts | ||
| Connector depart numbers | |||
|---|---|---|---|
| Cable connector | Terminals | Maximum on-going per circuit | |
| Molex 67582-0000 | Molex 67581-0000 | 1.5 amps | |
| Official cable/connector maximum wattage manner of speaking | |||
|---|---|---|---|
| Voltage rail | Number of lines | Maximum current | Upper limit wattage |
| +3.3 volts | 3 | 4.5 amps | 14.85 watts |
| +5 volts | 3 | 4.5 amps | 22.5 Watts |
| +12 volts | 3 | 4.5 amps | 54 watts |
You bear to be careful approximately SATA magnate cables. Some of them are missing the 3.3 volt wire. People with older power supplies often habituate adapters which convert from 4 pin peripheral cables to SATA power cables. But since 4 pin peripheral connectors only supply 5 and 12 volts, the SATA connective is missing 3.3 volts (there's no orange wire). There are also a couple of older power supplies which inexplicably have SATA power cables which are missing the 3.3 volt wire. Currently, SATA drives rarely use 3.3 volts. That English hawthorn be because there are too many people using adapters so the drive makers don't want the headaches which come with using 3.3 volts. Only in the time to come, 3.3 volt drives may get common so you need to be blow-by-blow when using SATA power cables which don't implement 3.3 volts.
ATX 20 pin chief power cable
In 1996 PC makers started switching to the ATX standard which defined a new 20 pin motherboard power connector. It includes a 3.3 V rail which is used to power newer chips which require a lower voltage than 5 volts. Information technology also has a standby 5 V rail which is e'er on even when the office furnish is turned off to provide standby major power to the motherboard when the machine is sleeping. The refreshing connexion likewise allows the motherboard to turn the power supply on and off sort o than hinge on the user to flip a mogul shift. This connector is polarized sol information technology can only be obstructed in pointing in the correct direction.
| Pinout | |||||
|---|---|---|---|---|---|
| Pins 1 through 10 | Pins 11 through 20 | ||||
| Description | Wire color | Pin number | Pin numeral | Wire tinge | Description |
| +3.3 volts | orange | 1 | 11 | orange | +3.3 volts |
| +3.3 volts | orange | 2 | 12 | drab | -12 volts |
| ground | black | 3 | 13 | black | ground |
| +5 volts | red | 4 | 14 | greenish | PS_ON# |
| ground | non-white | 5 | 15 | black | ground |
| +5 volts | scarlet | 6 | 16 | fateful | land |
| ground | black | 7 | 17 | black | solid ground |
| PWR_OK | gray | 8 | 18 | dilute | -5 volts (optional) |
| VSB +5 volts | purple | 9 | 19 | red | +5 volts |
| +12 volts | yellow | 10 | 20 | red | +5 volts |
Some of the emf lines on the connector may induce smaller sense wires which allow the powerfulness supply to sense what emf is actually seen past the motherboard. These are pretty common on the 3.3 volt line in pin 11 but are sometimes in use for other voltages too. The -5 volt line connected pin 18 was made optional in ATX12V 1.3 (introduced in 2003) because -5 had been seldom used for years. Newer motherboards virtually never require -5 volts simply many experienced motherboards do. Most newer powerfulness supplies don't provide -5 volts in which case the white electrify is missing.
| Connector part numbers | |||
|---|---|---|---|
| Motherboard connector | Cable connexion | Terminals | Maximum stream per electrical circuit |
| Molex 39-28-1203 | Molex 39-01-2200 | Molex 39-00-0168, Molex 44476-1111 | 6 amps |
| Unofficial cable/connector maximum wattage delivery for of import rails | |||
|---|---|---|---|
| Voltage rail | Number of lines | Maximum on-line | Maximum electrical power |
| +3.3 volts | 3 | 18 amps | 59 watts |
| +5 volts | 4 | 24 amps | 120 watts |
| +12 volts | 1 | 6 amps | 72 watts |
Dell used to ship many computers which used motherboards and power supplies which looked wish plain old ATX simply were non genuinely ATX in the least. If you plugged a real ATX power supply into the motherboard then things went kaboom (or frzzzzzap or ...). Unhappily, whatever large computer vendors like to put away customers into buying upgrades from them kinda from a third party. That's filthy enough but Dell built their non-standard computers and motherboards with what looked like received ATX components. You only found out other than once sparks started fast-flying. The Dell PCs which were carrying this ticking time-bomb were made between 1996 and 2000. If you're replacing a Dell power supply from this era then you should yell Dell and constitute sure it's not a proprietary design. And if they say yes and so be sure to interpreter your displeasure. This is an evil business practice which should stop.
You can chaw a 20 flag ATX baron telegraph into a motherboard with a 24 pin ATX connector. The image above shows the 20 immobilize business leader cable plugged into a 24 pin motherboard. A 20 pin powerfulness cable entirely fits into one end of a 24 pin motherboard connector so you can't insert it wrongly. The 24 pin motherboard connective is actually just the 20 pin connector with 4 extra pins added on the end. The original 20 pins were unchanged. The extra 4 pins are not separate rails. They're just unscheduled lines to provide much current to the same rails. On every 24 immobilise motherboard I've seen, the extra lines for land, 3.3, 5, and 12 are fair-minded on-line to the other lines happening the same rail in from the 20 pin connector. I've ne'er detected of exceptions and it doesn't make sense for motherboard makers to create whatever. As a result, you can plug a 20 trap cable into a 24 pin motherboard and it will work just fine. At any rate, it will for a while. They added those unnecessary 4 pins for a reason. When you plug a 20 pivot cable into a 24 oarlock connection you're not providing the extra contemporary carrying capacity which may be needed by the motherboard. If your motherboard's current requirements are low enough then it will ferment properly with only a 20 personal identification number power cabled plugged in. But if the motherboard draws enough topical, then you can overheat the 20 pins you're using along the 24 pin connector. I've seen decent pictures of burned ATX principal connectors to assure you that this happens. In adding the extra four pins, 3.3 volts went from 3 to 4 lines. 5 volts when from 4 to 5 lines. 12 volts went from 1 to 2 lines so its capacity doubled. Connectors really do flummox hot if you overload them so the safest thing to do is use a real 24 pin power cater on a motherboard with a 24 pin connective. Note that your 24 pin machine may work fine with a 20 pin king supply until you add a PCI Express identity card later on down the road. PCI Press out cards can draw play up to 75 watts through the motherboard connector so adding an expansion circuit card can substantially increase tycoo draw through the main exponent cable television. Some PCI Express video card game which have the 6 pin or 8 pin PCI Verbalize power cable still draw a substantial portion of their 12 V warhead direct the PCI Express slot. The extra 4 pins doubled the current electrical capacity of the 12 volt rail and then that one is easy to overload when exclusively victimisation a 20 flag main power cable.
The visualise above shows an adaptor which allows you to plug a 20 pin power supply into a 24 pin motherboard. These do not solve the problems mentioned above. In fact, they usually make things worsened. You still have solitary the same old 20 wires and pin&socket connectors that you would have if you plugged it directly into the motherboard. But with the adapter you too stimulate thirster wires and another bent of pins&sockets so you induce a high emf drop and many things which posterior go wrong. All the adapter does is hit the problem from the 24 pin motherboard connector and displace it to the 20 pin connecter on the adapter. Roughly the only good thing it does is to make a point the 20 pin connector connected the adaptor melts rather than the 24 pin connection on the motherboard. You shouldn't underrating the possible problems which come from adding another connective between the power supply and the motherboard. The resistance of connectors stool increase due to being plugged and unplugged. Increasing the resistance makes the connector drop more emf and dissipate more heat. Any bi of fleshly changes can also cause higher connecter resistance which causes more problems. You shouldn't place an unscheduled connective in a altissimo underway path unless you've got a good rationality. That's a good rule for power cables in the main but it goes doubly for the unpeasant-smelling current draws you sometimes find through motherboard main ability cables. The best practice is to avoid these 20 to 24 pin adapters and bugger off a real 24 pin powerfulness supply.
ATX 24 personal identification number intense baron cable
The 24 pin main power connector was added in ATX12V 2.0 to leave extra power needed by PCI Express slots. The older 20 bowling pin main power cable length simply has ace 12 volt line. The new 24 pin connective added one line to each one for ground, 3.3, 5, and 12 volts. The additive pins made the auxiliary power line unnecessary thusly most ATX12V 2.x power supplies don't take in them. The 24 pin connector is polarized so IT can only be blocked in pointing in the correct direction.
| Pinout | |||||
|---|---|---|---|---|---|
| Pins 1 done 12 | Pins 13 through 24 | ||||
| Verbal description | Telegraph color | Personal identification number number | Pin number | Wire color | Description |
| +3.3 volts | orange | 1 | 13 | Orange | +3.3 volts |
| +3.3 volts | orange | 2 | 14 | blue | -12 volts |
| ground | black | 3 | 15 | black | ground |
| +5 volts | red | 4 | 16 | common | PS_ON# |
| ground | black | 5 | 17 | black | ground |
| +5 volts | red | 6 | 18 | covert | ground |
| priming | black | 7 | 19 | black | ground |
| PWR_OK | hoary | 8 | 20 | white | -5 volts (optional) |
| VSB +5 volts | purple | 9 | 21 | red | +5 volts |
| +12 volts | yellow | 10 | 22 | red | +5 volts |
| +12 volts | yellow | 11 | 23 | ruby-red | +5 volts |
| +3.3 volts | orange | 12 | 24 | pitch-dark | ground |
Some of the voltage lines on the connector may have smaller sense wires which admit the power supply to sense what voltage is actually seen by the motherboard. These are beautiful usual on the 3.3 V line in pin 13 but are sometimes used for other voltages too. The -5 volt melodic line on pin 20 was made optional in ATX12V 1.3 (introduced in 2003) because -5 had been rarely used for old age. Newer motherboards virtually never want -5 volts but numerous older motherboards perform. Most newer power supplies don't provide -5 volts in which case the white wire is missing.
| Connector part numbers | |||
|---|---|---|---|
| Motherboard connector | Cable connector | Terminals | Maximum current per circuit |
| Molex 39-28-1243 | Molex 39-01-2240 | Molex 39-00-0168, Molex 44476-1111 | 6 amps |
| Drumhead cable/connector maximum wattage delivery for main rails | |||
|---|---|---|---|
| Voltage rail | Number of lines | Maximum current | Maximal wattage |
| +3.3 volts | 4 | 24 amps | 79.2 Isaac Watts |
| +5 volts | 5 | 30 amps | 150 watts |
| +12 volts | 2 | 12 amps | 144 watts |
If you have an ATX power supply with a 24 pin chief cable, it's hunky-dory to plug IT into a motherboard with a 20 pin connector. IT was designed to work that way. You can see an model in the picture above. The extra 4 pins happening the cable just flow over the end of the motherboard connector. The 24 pin cable television service simply fits into a 20 pin socket at cardinal end so you can't plug it in incorrectly. The extra 4 pins were added to the 24 pin variant of the cable to provide one extra telegram for establish, 3.3, 5, and 12 volts. But it's okay to result those 4 pins disconnected because a motherboard with a 20 pin connector doesn't need them. The only job you can bump into (literally) is if there is something block the spot where the 24 pin overseas telegram hangs over the goal. Oregon sometimes the end of the 20 pin motherboard connecter is too thick to fit between the pins of the 24 pivot cable. You can solve that problem aside with kid gloves shaving down one end of the 20 pin motherboard connector. It's just plastic. You won't miss it. If you can't get them to fit together then you potty get an adapter cable which will make it shape. The 24 pin cable plugs into one end of the adapter and then the arranger plugs into the 20 pin motherboard. But you should avoid using that kind of adaptor if you can because the extra wire and connector are just Sir Thomas More things which can go wrong. Adapters also somewhat increment the voltage unload which is something worth avoiding. It's better to first see if you throne get a 24 pin cable length to fit into a 20 pin motherboard before resorting to an adapter.
ATX 20+4 pin main power cable
Motherboards can get along with either a 20 immobilize main force connector or a 24 pin of import mogul connector. More tycoo supplies arrive with a 20+4 cable which is matched with both 20 and 24 pin motherboards. A 20+4 power overseas telegram has two pieces: a 20 pin piece, and a 4 pin piece. If you leave the ii pieces separate then you can wa the 20 pin piece into a 20 fall motherboard and leave the 4 fall opus unplugged. Follow for certain to get out the 4 pin opus unplugged true if it fits into another connector. The 4 pin piece is non compatible with any other connectors. If you plug the two pieces of a 20+4 power line jointly then you take over a 24 pin power cable which rear end be plugged into a 24 pin motherboard.
4 pin ATX +12 V superpowe cable
Older computers put most of their load on 3.3 and 5 volts. As prison term passed, computers drew more and more of their load from 12 volts (see here). Before this power cable television was introduced there was just one 12 V line provided to the motherboard. This cablegram added cardinal more 12 volt lines then more of the load could be shifted to 12 volts. The power coming from this connector is usually used to power the C.P.U. but some motherboards use it for other things as well. The presense of this connector on a motherboard way it's an ATX12V motherboard. For twofold 12 volt rail power supplies, this connector provides the voltage refered to as 12V2. The might cable which plugs into the 4 pin connective has two black wires and 2 yellow wires. This cable is sometimes called an "ATX12V" cable operating theatre "P4" cable although neither of those are technically accurate descriptions.
If you have one of these connectors happening a motherboard and so you must ballyhoo a power cable television into it or your CPU won't get any power. The one exception is that when this connecter was unaccustomed, some motherboards shipped with a socket into which you could plug a 4 pin incident power cable as an alternative. That helped people World Health Organization had older power supplies which didn't have the 4 pin 12 volt cable length.
The 4 pin 12 volt cable is polarized so it tin can only be blocked into the 4 tholepin motherboard connector correctly. If you look carefully at the picture above you can see that two of the pins are square and the other two suffer rounded corners. The motherboard connectors as wel have the same square and rounded arrangement so the power line only fits in one way. At least that's honorable unless you try really catchy to force it into the connector. With enough force you give notice sometimes pose a cable with a small number of pins into a connector which doesn't match. If you look cautiously you can also see that the square and rounded pattern matches various positions on other motherboard connectors like the 20 pin main great power connective and 24 pin main power connective. Do yourself a favor and exclusive plug the 4 pin 12 volt cable into the motherboard connector where it belongs (unless you enjoy sens and deep-fried components).
If your power cater doesn't have a 4 pin 12 V cable then you can allow one with the adaptor shown preceding. It converts a 4 tholepin peripheral cable into a 4 pin 12 V cable system.
| Pinout | |||||
|---|---|---|---|---|---|
| Pins 1, 2 | Pins 3, 4 | ||||
| Verbal description | Wire color | Oarlock number | Pin telephone number | Wire color | Description |
| found | black | 1 | 3 | yellow | +12 volts |
| ground | black | 2 | 4 | yellow | +12 volts |
| Connexion part numbers | |||
|---|---|---|---|
| Motherboard connexion | Cable connective | Terminals | Utmost present-day per circuit |
| Molex 39-28-1043 | Molex 39-01-2040 | Molex 39-00-0168, Molex 44476-1111 | 8 amps |
| Unofficial cable/connector maximum electrical power manner of speaking | |||
|---|---|---|---|
| Voltage rail | Number of lines | Utmost electric current | Maximum electrical power |
| +12 volts | 2 | 16 amps | 192 watts |
You can plug a 4 pin 12 volt power line into an 8 pin EPS motherboard connector merely at that place's no guarantee that it will work. If the motherboard expects only one 12 volt rail then a 4 PIN number 12 volt cable English hawthorn work. If the motherboard expects two 12 volt rails (many dual Mainframe motherboards ask incomparable 12 volt fulminate per Central processor) then it won't bring off. Even if the motherboard whole kit with a 4 pin 12 volt cable, you are still entirely providing incomplete of the incumbent carrying capacity which would be provided by an 8 pin EPS cable. That toilet overheat some the motherboard connecter and 4 pin cable. Destroyed or melted connectors can be a result. A motherboard which has the 8 pin EPS connector expects a lot of current and you are fetching a solid take a chanc by plugging in a 4 pin cable. The 4 rowlock cable only fits at one end of the 8 pin EPS motherboard connector so you rear end't plug it in improperly. That is, it only fits into one end of the motherboard connection unless you force it. If the cable doesn't go into the socket easily then you're probably difficult to plug it into the wrong close. But but then, it's non a good idea to try to run with a 4 pin cable in an 8 pin motherboard anyway.
8 pin EPS +12 volt power line
This cable television was originally created for workstations to leave 12 volts to power multiple CPUs. But as time has passed umteen CPUs require more 12 volt power and the 8 pin 12 volt transmission line is often put-upon alternatively of a 4 pin 12 volt cable. Dependant on the top executive furnish, the connector whitethorn contain one 12 volt rail in all 8 pins or two 12 volt rail attractive up 4 pins apiece. It is often refered to as an "EPS12V" cable.
The 8 flag 12 volt cable is polarized so it can only be plugged into the 8 personal identification number motherboard connector right. If you look cautiously at the picture preceding you tush see that tetrad of the pins are squarely and the other four take over rounded corners. The motherboard connectors also have the same square and semilunar arrangement so the power cable only fits in peerless way. At least that's true unless you essa real hard to force it into the connector. With enough force you can sometimes get a cable with a small come of pins into a connector which doesn't match. The 8 pin telegraph has enough pins that it's pretty hard to insert it in the wrong direction only determined people might be able to serve information technology. If you look with kid gloves you can as wel determine that the square and rounded pattern matches respective positions on other motherboard connectors equal the 20 pin main power connector and 24 pin main power connector. You should only plug the 8 thole 12 V cable into the motherboard connector where it belongs unless you enjoy the smell of fried electronics.
You can also plug an 8 pin 12 V cable into a 4 pin 12 volt motherboard connector. I don't have a picture of this peerless but it looks twin to this. Four of the pins on the 8 pin cable fit into the motherboard connector and the other four pins fall dispatch the end. The 8 pin cable television service only fits into one end of the 4 fall motherboard connector unless you try hard to force it into the wrong position. The 8 pin cable is electrically compatible but IT may not fit into a 4 pin motherboard. Thither is oft a component which blocks the area where the 4 pins would hang off the end. And sometimes the plastic end of the 4 trap connecter is too thick to fit between the pins of the 8 pin cable.
Make sure that you don't try to plug away an 8 pin 12 volt cable into the 8 Pin PCI Expressage power connector on a video card. The two cables look very look-alike so IT's abundant to get the two confused. 8 Pin PCI Express might cables are usually labeled to key them from 8 fall 12 volt cables. The PCI Express cable usually has "PCI-E" written on the connector. If in that respect are no labels then you can usually use wire colors to Tell the cardinal kinds of cables apart. An 8 personal identification number 12 volt cable system has yellow wires on the unvarying side arsenic the connexion nip off. An 8 Pin PCI Express cable system has black wires along the clip side. The two power cables are also tonal differently so you can't plug one kinda power cable into the other kinda connective. But as with this rather connector, you canful sometimes force the wrong kind of cable into a connecter if you push hard enough. Urinate sure you have the right kind of cable length before plugging information technology in. The two are emphatically not compatible with each else.
| Pinout | |||||
|---|---|---|---|---|---|
| Pins 1 through 4 | Pins 5 through 8 | ||||
| Description | Telegram color | PIN | PIN number | Wire color | Verbal description |
| ground | black | 1 | 5 | yellow | +12 volts (12V1) |
| ground | black | 2 | 6 | yellow | +12 volts (12V1) |
| ground | black | 3 | 7 | yellow | +12 volts (12V1 or 12V2) |
| priming coat | black | 4 | 8 | yellow | +12 volts (12V1 Beaver State 12V2) |
| Connector part numbers | |||
|---|---|---|---|
| Motherboard connexion | Cable connector | Terminals | Maximum current per electric circuit |
| Molex 39-28-1083 | Molex 39-01-2080 | Molex 39-00-0168, Molex 44476-1111 | 7 amps |
| Unofficial telegraph/connector maximum electrical power delivery | |||
|---|---|---|---|
| Voltage rail | Number of lines | Supreme current | Maximum wattage |
| +12 volts | 4 | 28 amps | 336 watts |
If you don't have an 8 pin 12 volt cable then you can use the adapter shown above. Information technology converts a couple of 4 fall peripheral power cables into an 8 stick 12 V cable. If you expend one of these adapters then be sure to plug the 4 pin peripheral connectors into separate cables coming from the power supply. If you plug them both into the same power provide wire then you are drawing all the power of the 8 pin 12 V connective through a single 18 gauge wire. You prat often get away thereupon simply there's no reason to have it off.
4+4 pin +12 volt power line
Motherboards can come with either a 4 pin 12 volt connective operating theatre an 8 pin 12 volt connector. Many power supplies come with a 4+4 pin 12 volt cable which is mixable with some 4 and 8 pin motherboards. A 4+4 power line has two separate 4 pin pieces. If you fire hydrant the two pieces of a 4+4 ability cable in concert then you have a 8 pin tycoo cable which can be plugged into an 8 pin 12 volt connector. If you leave the ii pieces separate then you stool plug one of the 4 pin pieces into a 4 pin 12 volt connector and leave the other 4 pin piece unplugged.
If you see with kid gloves at the image in a higher place then you can see the polarization of the pins which prevents you from plugging the cable television service in improperly. Some of the pins are square and some of them have annulate off corners. The motherboard connectors have matching honorable and rounded off corners to keep the cable from being plugged in the wrong means. But if you look really carefully at the word-perfect half of this picky cable and then look at the 8 thole 12 volt cable depicted above you'll notice that they don't match. A regular 8 pin cable has Little Jo square pins and four rounded ones but the 4+4 cable television service shown preceding has two square pins and 6 rounded ones. The left uncomplete of the 4+4 matches the nigh uncomplete of an 8 pin telegraph but the right incomplete is different. Hmmmm... And this International Relations and Security Network't some bizarre cable either. I've seen plenty of 4+4s which look like this one. Then there are early 4+4 cables which look just like an 8 pin cable split in two (which makes sense). Since rounded pins fit into squarish holes in motherboard connectors, this particular wire will fit just fine into an 8 pin 12 volt motherboard connector. But some halves of this 4+4 will gibe into a 4 pin 12 volt motherboard connector. You'ray supposed to purpose the left incomplete of the cable shown above when plugging information technology into a 4 pin motherboard connector only the right half will also fit. Atomic number 3 it happens, either half will go fine in a 4 pin motherboard because both halves of the 4+4 just cater 12 volts. The pinouts are the same for some halves so either one will work. I'm non sure why they make cables like this one because you'd fig a 4+4 cable would just be an 8 pin cable which splits in two. And you only need one half of a 4+4 line to plug into a 4 pin motherboard. The other half is inactive. Only the kind of 4+4 cable shown above is pretty common then don't let it switch you.
6 fall PCI Express power cable
This cable television is accustomed offer extra 12 volt power to PCI Express expansion cards. PCI Express motherboard slots can provide a maximum of 75 watts. Many video cards run significantly more than 75 watts so the 6 pin PCI Express power line was created. These high-might card game draw most of their power from the 12 V rail so this cable provides only 12 volts. These are sometimes called "PCI Express cables". They are also occasionally called "PEG cables" where "Nog" stands for PCI Express Graphics. If your might supply doesn't have a 6 trap PCI Express cable then you tail use the arranger shown above on the right to convert two 4 PIN peripheral device cables into a PCI Express cable. If you use an adaptor then be sure to plug the 4 pin peripheral connectors into separate cables coming from the power supply. If you plug them both into the same power append cable length then you are draftsmanship complete the business leader of the PCI Express connector through a single 18 gauge wire. You put up usually puzzle over away with that but there's no reason to make out. The PCI Express 6 pin connector is polarized so it butt only be obstructed in pointing in the exact direction. But As with connectors of this type, you can sometimes impel them into the damage gracious of socket if you try woody enough. If it doesn't slide in easily then you're plausibly plugging it into the wrongheaded place.
Some video cards fare with the 8 pin PCI Express power connector to support higher electric power than the 6 pin PCI Express connectors. IT's okay to plug a 6 pin PCI State power cable into an 8 pin PCI Press out connector. It's configured to work that way but will atomic number 4 modified to the depress wattage provided by the 6 rowlock version of the cable. The 6 personal identification number line only fits into one end of the 8 pin connector and so you can't put in it incorrectly only you can sometimes force the 6 pin cable in the incorrect mode if you try hard enough. Video cards can sense whether you have obstructed a 6 PIN or 8 pin cable television into an 8 PIN number connector so the TV card can impose some kind of restriction when running with only a 6 pin power line. Some cards will scraps to run with only a 6 pin cable in an 8 pin socket. Others will work with a 6 pin cable at normal speeds merely will not allow overclocking. Check the telecasting card documentation to get the rules. But if you don't have any separate information and so just assume that if your video wit has an 8 pin connector and then you must connect an 8 pin cable.
| Pinout | |||||
|---|---|---|---|---|---|
| Pins 1 direct 3 | Pins 4 through and through 6 | ||||
| Verbal description | Wire color | Pin number | Pin number | Wire colouring | Description |
| +12 volts | dishonorable | 1 | 4 | black | ground |
| +12 volts operating theater not contiguous | yellow surgery not connected | 2 | 5 | black | prime |
| +12 volts | yellow | 3 | 6 | black | ground |
| Connexion part Book of Numbers | |||
|---|---|---|---|
| Video card connection | Cable connector | Terminals | Utmost current per tour |
| Molex 45558-0002 | Molex 45559-0002 | Molex 39-00-0168, Molex 44476-1111 | 8 amps |
| Official cable/connector maximum electrical power delivery | |||
|---|---|---|---|
| Potential rail | Number of lines | Upper limit current | Maximum electrical power |
| +12 volts | 3 | 2.083 amps | 75 watts |
The PCI Express specification is, alas, not a free, world specification. So all but people have never seen IT. Including me. ATX stipulation: freely for sale to completely. PCI Express specification: expensive so hardly anyone has seen it. ATX: good. PCI Expressage: sad. It's a shame when a wide used standardised isn't freely available to the common. Yet, information leaks out from the specification and the 6 bowling pin PCI Express top executive cable is actually rated at an extremely standpat 75 watts. I have no idea why the wattage is rated so low because the specifications from Molex clearly allow substantially more power. Part of the intellect Crataegus oxycantha be that thole 2 (listed to a higher place as a 12 volt line) Crataegus laevigata be listed Eastern Samoa not connected in the spec. I've never seen a 6 pin PCI Verbalize power cable with pin 2 non connected. They've all had a 12 volt line of reasoning connected to pin 2. I've also seen claims that there May Be unimplemented sensory faculty lines in the specification. Welcome to the uncertainty which happens when you Don River't have freely free specifications. Even with single cardinal 12 V lines the standard implementation of PCI Express power cables use large sufficient standard of measurement wire and a good enough connector to put up very much to a higher degree the three amps per telegram required to allow 75 watts. Even so, the 6 pin PCI Express power cable officially provides single 75 watts. Probably, however, real implementations of this superpowe cable can allow far much 75 watts.
8 pin PCI Limited power cable
The PCI Express 2.0 specification discharged in Jan 2007 added an 8 pin PCI Expressed power line. It's just an 8 pin version of the 6 Pin PCI Fast power cable. Both are primarily victimized to provide auxiliary powerfulness to video cards. The old 6 pin version officially provides a maximum of 75 Isaac Watts (although unofficially it force out usually provide much Thomas More) whereas the new 8 pin version provides a maximum of 150 Isaac Watts. It is very easy to confuse the 8 pin version with the very similar-looking EPS 8 pin 12 volt cable.
The 8 flag PCI Express and the EPS 8 pin 12 volt connectors are polarized differently so you South Korean won't be able to plug one kind of cable into the other kinda connecter. That is, you won't be able to plug the reprehensible kind of cable in unless you try really hard. Unfortunately, the Molex Miniskirt-fit Jr. connectors used by some kinds of power cables seat sometimes be forced into a differently-polarized connector if they single have a few pins and you pushing hard enough. If the cable won't slide down in easily then you'ray in all likelihood trying to stick in the wrong rather cable. The 8 pin PCI Express connexion does have a small plastic span which prevents it from being obstructed into an EPS 8 fall 12 volt motherboard connector. You prat see the bridge in the image above between the right cardinal pins in the top run-in of the connector. But there's none such protection to keep EPS 8 thole 12 volt cables from being obstructed into an 8 pin PCI Express connecter on a video scorecard. That combination may fit if you shove hard sufficient. And if you connect the wrong kind of cable then expect fireworks. Some of the grounds and 12 volts wires for an EPS 8 pin 12 volt are reversed compared to an 8 pin PCI Give tongue to. Fortunately, most 8 pin PCI Express connectors are tagged "PCI-E" so people won't confuse them with EPS 8 pin 12 volt cables. If the connectors aren't labeled and then you can tell an 8 stick PCI Express power cable from an EPS 8 pin 12 volt cable by checking the color of the wires which chaw into the clip side of the connective. On the EPS 8 pin cable, the yellow wires (the 12 volt wires) move into the clip side of the connector. Along the 8 pin PCI Express cable, the wires on the clip side are all Shirley Temple Black (yard). That's the same as it is with the 6 Pin PCI Express power cable. Course, none of this helps you if your cable uses the trendy all-the-same-color-wires design which is best-selling with high-fashion power supplies. In that case you'll just have to constitute very careful OR hope the connectors are labeled.
| Pinout | |||||
|---|---|---|---|---|---|
| Pins 1 through 3 | Pins 4 finished 6 | ||||
| Description | Wire color | Pin number | PIN number | Wire color | Verbal description |
| +12 volts | chromatic | 1 | 5 | disgraceful | ground |
| +12 volts | yellow | 2 | 6 | black | ground |
| +12 volts | yellow | 3 | 7 | black | ground |
| ground | black | 4 | 8 | black | ground |
| Connector part numbers | |||
|---|---|---|---|
| Video identity card connector | Cable connector | Terminals | Maximum current per circuit |
| ? | ? | ? | ? |
| Official cable television service/connector maximal electrical power delivery | |||
|---|---|---|---|
| Voltage rail | Number of lines | Level bes current | Maximum electric power |
| +12 volts | 3 | 4.167 | 150 watts |
6+2 pin PCI Express tycoo cable
Some picture cards have 6 Pin PCI Utter power connectors and others have 8 Pin PCI Express power connectors. Some power supplies come with a 6+2 PCI Extract power cable which is compatible with both kinds of video card game. The 6+2 PCI Express power line is made up of two pieces: a 6 pin nibble, and a 2 trap piece. If you put the two pieces together then you have a full 8 pin PCI Express power cable. But if you split the connector into two parts then you can plug the 6 fall part into the older 6 pin PCI Express connexion and leave the 2 pin set forth unplugged. That way, your power supply only needs to get one 6+2 cable to live congenial with both 6 pin and 8 pin PCI Express connectors.
| Video card information |
|---|
|
| Useful subject information |
|---|
|
| Random choke up |
|---|
|
Molex to 3 Pin Fan Adapter Best Buy
Source: http://www.playtool.com/pages/psuconnectors/connectors.html
0 Komentar
Post a Comment