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Main => Main Forum => Topic started by: MYX on May 26, 2006, 10:04:08 pm

Title: Computer PSU Pinout?
Post by: MYX on May 26, 2006, 10:04:08 pm

As a result of a previous thread, I will be using an additional Computer PUS to supply power to my audio amp as well as other misc. circuts. My question is this... There are a BUNCH of wires in a bundle that run from the CPU to the motherboard. Are these standard? Are the colors standard? What do all the lines do (if they are standard)?
I will need to trick the PSU to think that it is always on and I have read (somewhere???) that if you cross line a to line b it will think that it is been turned on. Any and all help is appreciated. Thanks

Title: Re: Computer PSU Pinout?
Post by: wrench on May 26, 2006, 10:45:53 pm

here's the fix

Title: Re: Computer PSU Pinout?
Post by: MYX on May 26, 2006, 11:05:58 pm

Great that solves that. Any ideas what the rest of the pinouts are for?

Title: Re: Computer PSU Pinout?
Post by: MonMotha on May 27, 2006, 01:08:56 am

http://xtronics.com/reference/atx_pinout.htm

First link on google.  A cursory inspection against what I rememeber of the pinout seems to indicate it is correct.

The colors are semi-standard.  Orange seems to always be 3.3V, Red is always 5V, yellow is always 12V, black is always ground.  After that there seems to be some variation.  Blue and gray/white are usually used for the negative rails, and green seems standard for the power remote.  Many PSUs will have a label on the side telling you what each color is.