920-fan command 2 pin connector from power supply not connected I have replace my power supply..but my new power supply didnt have the 2 pin..

How PC Fans Work - PCB Heaven

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Mar 29, 2010 - The connector of a 2-wire fan has a red and a black cable. ... The firsttwo wires are the power supply of the fan. ... This fan is designed to be controlled with a PWM signal and .... I have a four-wire (red black yellow blue) 12v fan out of an old .... My case has a number of 2 pin outputs for multiple case fans, ...

Motherboard Power Connectors ' PC Repair and ... - InformIT

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InformITFeb 28, 2003 - Table 3.3 ATX Main Power Supply Connector Pinout (Wire Side View) .... The auxiliary connector has no +12v leads at all, so that is no help. Pulling up to ...Pin. Signal. Color. Yellow. +12V. 3. 1. Gnd. Black. Yellow. +12V. 4. 2.

ATX 24 pin power supply connector pinout diagram ...

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Jan 28, 2014 - Pinout of ATX (ATX12V) 24 pin power supply connector and layout of ... and later (ATX12V 2) is common ATX standard, 24 pin connector. ... Power Ok is a status signal generated by the power supply to notify ... 10, 12V, Yellow, +12 VDC ... 18 AWG is recommended for all wires except pin 11, which should ...

ATX power supply connector pinout diagram @ pino

do this test this will tell you if your power supply is good or bad we will do the process of elimination ok.
How do I test if the power supply is bad?
Warning This test is for those with extensive electronics training. Do not try this if you do not have extensive electronics training. Make sure there is enough load connected to the power supply before testing ( at least motherboard and one hard drive)!


ATX power connector layout isshown above. 5VSB constantly provides 5V power to the connector through pin 9. If you have a voltmeter, while the power supply fan does not turn on, you could identify which pin is pin 9. Normally there is a clip on the connector between pin 15 and 16. If one can identify pin 14 (the only green wire goes to pin 14), this is the power-on pin. Onee can use a piece of wire to short pin 14 and 15 (or any other black wired ground pin). If you power supply has power connected to it and power switch on the power supply is on, the fan should be turning by now. Otherwise, your power supply may have problem.

The 3 pin fan is basically a 2 speed fan- it has a slower fan speed for aircon and a faster speed for engine cooling.

Check the wiring on the fan- there should be a common earth, probably a black wire. The other two will need power for the two different speeds. Use some spare wire and connect the earth wire to the battery earth. Then run a power wire from your bat positive and connect to one of the other wires. As the fan comes on hold tight as it can have quite a kick to it!

Test which wire is for the fast speed and the connect that fast speed wire and the earth to the two pin connector on your vehicle. Ensure that the polarity of the wiring is right- ie the fan is turning in the right direction! If not, reverse them and this will change the direction of the fan.

The CPU Fan is not working. Contact Compaq or go on Ebay and see if you can find a replacement fan. If you continue using your PC without the CPU fan operating, you will burn out the CPU. I hope this helps. Good luck and have a pleasent day.

You can piggy back up to 3 of the fans to the one connector from your power supply.

Most motherboards now have a 24-pin power supply connector. If you haven't already found a diagram showing the pinouts of the 20- and 24-pin power plugs, here's one borrowed from a handy site:



The two plugs are essentially the same, but the 24-pin version duplicates some voltages on the extra pins. The extra pins in the larger connector were meant to provide extra current paths for voltages that see heavy loads from newer processors and motherboard circuitry. Depending on how a motherboard is designed, it might work with a 20-pin plug connected (leaving pins 11, 12, 23 and 24 empty). But typically if the board has a 24-pin connector it needs the 24-pin power supply plug.

Most power supplies have a 20-pin plug with a separate 4-pin section that fastens to it for connection to a 24-pin mobo connector. It typically has one side designed to slide onto the end of the 20-pin plug, essentially turning it into the 24-pin version. This added plug does not have a retaining clamp on its side, so you can tell it from the the 4-pin CPU power plug. The wire colors are also different. For reference, here is the processor power plug, from the same website:


New motherboard specs call for the separate processor power connector for the same reason the extra pins were added to the power supply connector: to handle the high currents needed by increasingly faster CPUs.

When the motherboard has these connectors, you need to use them all to get everything working. Hope this helps. Thanks to smspowersupply.com for the diagrams, and thank you for using Fixya.

then connect the fan to a 2-pin connecter if you cant do it take it to a computer place to do it for you

Hmmm.... mainly you have:
-20 or 24-pins connector, that is unique and goes directly to motherboard (powers motherboard and its components)
-4 or 8-pins connector that powers CPU
-the rest would be connectors for ROM (CD/DVD/BlueRay) and HDD devices (there are: molex and sata power conectors)

If you totaly unshure, there is manual:
Illustrated How to Replace an ATX Power Supply

It is a 2 lead wire (red/white and black) that connect right next to the memory slot. you have to connect the red/white wire to the 5v+ side of the 4 pin peripheral and the black lead to the com (black) on the same 4 pin peripheral. i can't really think of any way better to explain at the moment. but any questions. email @ [email protected]

yes 20 pin connecter power supply is ATX(advance technology extended )power supply and old which was low watt and 24 pin is EATX (enhaunced advance technology extended) power supply is new and high watt so 4 pin connecter can be detached from 24 pin connecter and can be fitted in 20 pin connecter