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Will these voltages cause instability?

D

DaLurker

[H]ard|Gawd
Joined
Sep 23, 2000
Messages
1,681
Lately I've been having trouble runing Prim95 indefinately on what previously were thought to be stable overclocks. After trying out different combinations and seeing weird patterns, I'm starting to think it's the PSU not putting out enough volts. Now one of the reasons I've come up with this recently is I discovered my Mobo pulls volts for the CPU off the 5V rail, and my 5v Rail isn't the most stable with my 350 Watt Enermax.

The thing I have been noticing recently is I can run prime 95 for variable amounts of time. Sometimes it'll run 2 hours, sometimes it will run 40 hours before an error occurs. Now I've been watching my volts, and I see that my 5V rail varies from 4.7-4.9V. My CPu voltages vary from 1.84 - 1.90. Now I Have yet to notice a clear pattern on whether there's a weird voltage drop when my prime 95 fails. Woul getting a new PSU that pumps out more amps to the 5 volt rail help me achieve a more stable overclock? Or is my CPu the culprit?
 
You are running a mobile xp.....doesn't that vary the voltage on the processor as part of the power saving's or does that not happen on a desktop board? At any rate if it was a desktop chip your voltage across the proc shouldn't be changing under load IIRC only when it is stepped down under a power saving scheme.

Now the spec's for your rails are supposed to be between +/-5% of their rated level. Anything outside is bad mojo.
 
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