Random crashes and underclocking

[TimWang]

I've underclocked my T43 and everything was okay for about a month. Now, I seem to be having a few random crashes now and then but nothing too serious. Maybe a few times a week. My question is regarding how I can narrow down the exact multiplier that I am crashing on so that I may increase the voltage at that multiplier.

[nrj45]

First i think you speak of undervolting and not underclocking ?

Run prime 95 at each multiplier to see the limit when the cpu begin to make errors (which is the lowest voltage to have no error at a given multiplier ?). And then fix the vcore a bit higher to keep a security.

[TimWang]

Wups, I meant unvervolting...

How exactly do I use Prime95?

[kyrotech]

http://www.mersenne.org/freesoft.htm

download latest version: p95v2414.exe

install

run prime95

Options > Torture Test > In-place large FFTs, OK

if you get errors, then change the voltage until you run without errors.

[nrj45]

Install it and run it... it's easy driving...

When you're lowering the vcore, prime95 will make calculation error before the computer crashes. So it's possible you set a too low vcore, just high enough so windows seems to be stable.

[Esben]

I'd recommend that you start at the fastest speed, and work your way downwards. By doing it that way, you get a higher temperature, which is more likely to provoke a crash.