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Can a low 5V rail give me cold boot probs?

MichaelD

MichaelD

Lifer
I get intermittent cold boot problems on my latest rig: Epox 8K5A2+/XP1600 AGOIA/Corsair PC3200. I have a Turbolink 420-watt PS THIS ONE that should supply me plenty of juice.

Unfortunately, the 5V line is always 4.78 volts, as per MBM. 12V is always just above 12V. Occasionally, on a reboot, I get a failure to boot, and sometimes get that "CPU has changed, please reset CPU" bios error message. I.E. my 10.5 x 166 setting reverts back to 10.5 x 133 (1400 instead of 1750MHz)

I am wondering if my low 5V rail could have anything to do w/it?

Is there a way to raise the 5V rail w/o screwing up the rest of the PS?

I have another 400-watt PS that I could swap it out for, but before doing all that work, I thought I'd ask. Thanks.
 
I don't think that can cause that problem.. the battery stores your information for cold boot.

plus, 4.78 surprisingly isn't really all that low. that is very average for 5v lines from what i have seen on computers that run mint.
 
Originally posted by: aircooled
Bad CMOS battery maybe???
Click to expand...

Hmm. The board is brand-new, and a "new" board at that. What are the odds? I guess I should just buy a new battery and check, huh?
 
your probably pushing it too much, when you clock the board too high and it fails it will revert back to standard clock speed.

im guessing sometimes its not successfully posting at 166.

if its staying at the same multiplier and the rest of your settings are staying, its likely not a bios problems, but your shooting too high.

try it at 150 and see whats happens.
 
*stomps foot* NO! The whole reason I bought this mobo/CPU/memory combo was to run at 10.5 x 166. 😛 No way I'm reverting to 150 or lower. 😉

I have raised the CPU voltage to 1.85. It seems to be OK now. Gone are my nice, cool temps (52C under load). But it seems stable. It does not crash at all during gaming/movies/music. It's just on reboot.

So far, so good. Thanks though. 🙂
 
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