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Low PSU voltages?

T

techfuzz

n00b
Joined
Oct 21, 2003
Messages
29
Recently I began experiencing random restarts of a hard drive and occasional hard lockups with one computer. I suspect it is a power supply problem. Currently I'm looking at the voltages in the BIOS and they read:
+3.3V = 3.26
+5V = 4.46
+12V = 11.85
-3.3V = 3.10
-5V = 5.42

I suspect the +5V rail is too low and causing most of the problems if not all of them. Can anyone shed some light on my situation? BTW, it is an Antec TruePower 330W that I got when I bought the Antec case.

techfuzz
 
-3.3V = 3.10
Click to expand...

... Wow. I'm speechless. If that's really straight out of the BIOS, your motherboard makers need to be slapped. Probably the CMOS battery reading, but nevertheless, that's unacceptable for a company to mess that up.

But, besides that, more info is needed. The full specs of you system and any OC'ing you are doing would be helpful, along with *REAL* readings of you rails taken by a meter, be it VOM or a digital multimeter.
 
Full specs:
Epox 8K5A2+ w/ 2400+ runnning (166 FSB @ 2GHz)
512MB Corsair PC3200C2
2x 80GB WDJB
VisionTek Ti4200 (stock)
48-16-48 CDRW
3x 80mm case fans

That's all there is which is why I think it's got to be the power supply. The reason why I say that is I have a dual P3 box with 2x as much draw on a similar power supply and it has never had a hiccup. Also, the mb locks ratios at 166 mhz fsb. I dropped the multiplier on the processor down so it would run at an overall stock speed of 2GHz but at the higher FSB. I know the chip is capable of at least 185 with a higher multiplier, but I haven't been running it that high for quite some time because I've been trying to narrow down my problem.

techfuzz
 
So I got another power supply that I swapped in to run for a while. So far it's looking better now, but I should let it sit for a few days to make sure.

+3.3V = @ 3.29
+5V = @4.91
+12V = @12.03

I didn't watch them too long to see if there were any major fluctuations like the previous power supply.

techfuzz
 
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