Originally Posted by 404zero
Can the auxiliary power connector be safely disconnected from my motherboard without causing any problems?
I have a Dell GX520 mini tower that has noisy coil whine in the power supply unit, but only when the computer is off.
I'm guessing that it's the auxiliary power that keeps feeding power into the power supply when everything is turned off?
If it can be safely disconnected, would I just unplug the 12v 4-pin connector to disable auxiliary power?
Thanks for your help!
there is no such thing as auxiliary power connector on the motherboard... the 12v 4-pin connector is the CPU power line... and no, you cannot disconnect it.
If your PSU is acting up, replace it now before it fries your computer. its less than 50$... much cheaper than a new computer.
The PSU keeps on feeding power when the computer is "off", via the 20 (or 24) port cable, not via the 4 pin cable. the mobo uses that power to listen for wake up (aka, power up) commands (via keyboard wakeup button, power button on case, ethernet port wakeup commands, or alarm based wakeups where you set in the bios for the computer to automatically turn on at a certain date and time).