Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > [Solved] Quick Testing of a PSU
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Best answer from JackNaylorPE.

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jaes   10-29-2009 at 01:14:08 AM

is there a quick and easy way to test a PSU without unplugging my all the wires from old PSU and pluggin in the new PSU ?

it could be a couple more weeks before i start getting the rest of my parts, and would like to test the PSU to make sure it works =P

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Best answer from JackNaylorPE
Well a volt meter works......try the paperclip trick to turn it on.

http://www.dvhardware.net/modules. [...] le&artid=5

I usually connect some fans to the molex cables just to have some load on the thing and an immediate visual indicator.
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JackNaylorPE   10-29-2009 at 01:26:43 AM
Best answer

Well a volt meter works......try the paperclip trick to turn it on.

http://www.dvhardware.net/modules. [...] le&artid=5

I usually connect some fans to the molex cables just to have some load on the thing and an immediate visual indicator.

------------------------------ If a man speaks in the forest and no woman hears him, is he still wrong ?
Marriage is a wonderful institution and all but when committed to an institution, they usually let you out after a while.
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jaes   10-29-2009 at 03:24:02 AM

could i just plug the motherboard connector into the mobo, then just test the fans on the molex, etc ?

there like 4 black wires, and i dont wanna guess if one is a ground wire or not lol


Message edited by jaes on 10-29-2009 at 03:48:08 AM
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Delluser1   10-29-2009 at 11:08:01 AM

Unless someone did some heavy modifications they ( black wires ) are all grounds.

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nukemaster   10-29-2009 at 03:10:31 PM

Delluser1 wrote :

Unless someone did some heavy modifications they ( black wires ) are all grounds.


+99999999999999999

Black= Ground
Red = 5
Yellow = 12
Orange = 3.3

Testing the psu with no load, while testing, will not ensure everything is working 100% right(since its under load that a psu can fail). but its a good start and you will know its not fully DOA.

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jaes   10-29-2009 at 04:36:17 PM

ok, that i didnt know (i'm no electrical engineer haha). but ya, just wanted to test to make sure it isnt a full doa

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JackNaylorPE   10-30-2009 at 05:30:08 AM

IIRC....for 3 speed fans

Yellow to Black = 12v
Red to Black = 5v
Yellow to Red = 7v

------------------------------ If a man speaks in the forest and no woman hears him, is he still wrong ?
Marriage is a wonderful institution and all but when committed to an institution, they usually let you out after a while.
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