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Coolermaster GX 650w PSU issue

Last response: in Components
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March 25, 2011 2:54:20 PM

Ok im new here and been told this is best place to come for help.

I recently purchased the above PSU due to my old psu fan failing and causing my pc to overheat

i installed the the new psu only to realise the 24pin ATX connector is missing pin 20 and when i plugged all the required

cables in the psu click on everything powers up for a second then it shuts down again.


I read somewhere that pin 20 is obsolete but i was wondering if its needed for my motherboard.



Im running:

Gigabyte X48 - DS4 mobo
Nvidia GTX 260
4gb corsaire ram
Intel Q9550 quad core CPU


is pin 20 needed or is it a faulty psu?

Any help or feedback is greatly appreciated
a c 288 ) Power supply
March 25, 2011 6:33:52 PM

The missing pin used to provide -5V, nothing has needed -5V in a long long time, and looking at your board there is zero chance that it might need -5V, im betting on a faulty PSU, the GX series isnt good and actually has bad ripple issues above a moderate load so dont plan on SLIing or you will push it too hard.
March 25, 2011 9:28:10 PM

thanks for the reply iv fixed my issue now and i wont be sliing this is an old pc now and im looking to build another the issue was ther was a cover on my psu 8 pin connector showing only 4 and like a douche i missed the cover plugged it in fully and works fine now cheers for help guys
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