bad power supply?

[Compton]

I've been having occasional system instabilities and I thought it was from overclocking but I'm beginning to suspect my power supply. My voltages are way off: 12V often drops down to 11.2V, 5V is often at 5.4V, and the 3.3V is up and down from minute to minute. This is a 300W ps that came with my Inwin Q500N case and I'm using an Aopen AX63 Pro. I suppose it could be the voltage regulators on the mobo but I thought Aopen had a very good reputation for stable boards ?? I'm not running a lot of devices, just a Celeron400, G200 Marvel PCI, SB PCI128, Winmodem, 5400rpm HD and a cheap ass cd rom Does anyone have any suggestions how to tell if my PS (or mobo) really is bad?

[Greebe]

Those voltages are out of spec by a tad... I'd get another PS and test.
How are these voltages loaded? Not exceeding any specs individually?

[Compton]

Thank you for replying! I'll try to get a new PS as soon as I can. I'm sorry but I dont exactly understand your question about the voltages being loaded. The numbers I quoted are from the hardware monitoring software. Usually when one voltage is low, another one is really high. Should I test them with a voltmeter? Also, if I get a new PS could I use this old one just to power fans and possibly a peltier? Or are peltiers too sensitive to low or high voltages? Thanks for you help.

[Gatto]

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Ia1 a21 I a26 a66I
Ib1 b21 I b26 b66I
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Connectors a22-25 ja b22-25 does no exist ,but there are allignment slots.

To save the time here are only the power connectors (i will NOT write all 132 )
a1 +12v
a5 Ground
a9 +3.3V vcc
a13 Ground
a16 +3.3V vcc
a19 Groun
a28 +3.3V vcc
a31 Groun
a34 +3.3V vdqq
a40 +3.3V vdqq
a43 Ground
a45 +3.3V vcc
a49 Ground
a52 +3.3V vdqq
a55 Ground
a58 +3.3V vddq
a61 Ground
a64 +3.3V vdqq

b2 +5,0V
b3 +5,0V
b5 Ground
b9 +3.3V vcc
b13 Ground
b16 +3.3V vcc
b19 ground
b28 +3.3V vcc
b31 ground
b34 +3.3V vdqq
b37 ground
b40 +3.3V vdqq
b43 ground
b45 +3.3V vcc
b47 +3.3V vdqq
b49 ground
b52 +3.3V vdqq
b55 ground
b58 +3.3V vdqq
b61 ground
b64 +3.3V vdqq

So there are many power connectors to the display board and those are the most common broblems
with the power...so check them first.
I thought that my power was faulty also but after i verified voltages with normal voltmeter
i thought it must be something else...so it was my g400 after all...either drivers or the board itself i dont know
but with new board ALL broblems went away.WEIRD!

I suffered random lockups and BSOD:S where sometimes sound would play on and on,and some times whole system would
freeze at middle of something!:<

I had underrated powersupply but the boblems
with it was always related to to startup as
the system consumes power more on startup as the gurus can verify

hope this helps

Gatto

Ps on`t trust software that tels you properties of your mobo...verify them yourself.

[Greebe]

Comp, I'm asking for the current being drawn from each supply line or the power load on each.