Memtest86 passes great, but Prime95 fails.

[Red]

I've recently done a fresh install on my Shuttle AN35N / mobile 2400+. I overclocked to 200 x 11. Temps are low.

Ram is 2 x 512mb of Kingmax PC-3500. I've got the timings set to 7-3-3-3, it seems to freeze up on anything besides that. When it is at these settings, memtest86 works perfect, but prime95 fails within 30 seconds. What is the deal? Do I need more volts to the cpu? Thanks!

 

[viivo]

Yes. You'd have to be the luckiest person in the world to run your mobile 2400+ prime stable at 1.45v at 2200, unless it's the 35 watt version.

 

[Snoop]

prime95 failing = cpu needs more juice

 

[nycxandy]

Originally posted by: Snoop
prime95 failing = cpu needs more juice

Definitely, up that vcore.

 

[Red]

I have the Shuttle AN35N and vcore is set to "Auto" .. how much juice *should* I set it to to make it rocksteady?

 

[dmw16]

Just go up by whatever the smallest step your mobo allows until you find a stable voltage. DOnt wanna go any further than need be.
-doug

 

[Zepper]

memtest does not stress the cpu - Prime does, duh...
.bh.

 

[Cerb]

Originally posted by: Snoop
prime95 failing = cpu needs more juice

 

[Snoop]

Originally posted by: Red
I have the Shuttle AN35N and vcore is set to "Auto" .. how much juice *should* I set it to to make it rocksteady?

Assuming this is a standard 2400+ and not a mobile, then stock vcore is 1.65, try bumping it up to 1.7, if still unstable, try 1.725 (maybe 1.75) but if its not stable here, drop the OC a little. Chances are though it should run fine with just another 1/2 volt

 

[Connoisseur]

Mobile 2400+ runs at 1.45Vcore default. Desktop 2400+ runs at 1.65Vcore default. You can take it to 1.65V with absolutely NO worry of damage. You can probably up it to 1.8V just as easily. I'd start at 1.65V. If it's stable there, bump down slowly until you find the minimum stable voltage. Otherwise go up. I wouldn't recommend past 1.85Vcore.

 

[0roo0roo]

heh mine does that speed at 1.85v😛 but i use crystal cpuid to dynamically change the multiplier, like powernow on laptops. goes from 400mhz to max speed based on cpu usage. drops 10c off temp during minor use like web surfing