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I'm looking for a program other than Prime95 to stress out the cpu exclusively?

R

Rob94hawk

Member
I'm trying to determin if my FX-53 is a reason for Prime95 cutting out on me after 2 hours. Temps during prime95 hit 49C tops according to the nvidia utility. I'm sure there is a deviation of ~4C so even that is still good. Note, I used the blend test for Prime95.

Tested ram with memtest86 for 12 hours overnight and came back with ZERO errors.

PSU was replaced from an Antec 480watt TrueBlue to a 500watt Ultra XConnect PSU (talk about cleaning up a rats nest in an instant!) Although Sandra reported -12V reading as -6V, don't know what that means.

All I have left to rule out is the FX-53. Is there another test that just totally stresses out the CPU?

Don't really know what to do at this point. I emailed AMD to see what they think and Corsair wants to exchange my ram.

The only thing I havent done is update to the latest BIOS.

Any advise is appreciated. Rob
 
Ditch the .5X multiplier on your CPU if you're using it - they do not actually work properly with the RAM. So your CPU might say it's running a 12.5X multiplier with a 200 MHz bus, but the RAM would end up with a 12X multiplier and a 208.3 MHz bus. That's my first thought for you. You might as well go with the 12X multiplier and specify the 208 MHz bus yourself. Drop the RAM timings to 2-3-2 as well - the tRCD is one of the first things to cause issues when running 2-2-2 timings.
 
For cpu load testing you can take any game, put it at the lowest possible settings and resolution, and let her fly.

Unless you have a geforce 2 MX or something youll be 100% cpu constnatly.
 
If load is what you want try folding@home it will keep your CPU @100 % forever if you let it. plus your helping a good cause Remember Anandtechs team number is 198
 
Lots of us have seen it happen. It'll stop running while taking like 1.5GB of RAM. It doesn't stop responding to windows but it just.... stops. It's weird but it's happened to me twice now.
 
Originally posted by: Rob94hawk
Originally posted by: Megamixman
Don't use Prime95, use stressCPU. Prime has some quirks with A64's.
Click to expand...

Got any documentation to back that up?
Click to expand...

There was a story published this week about this issue. I think it was in the Inq, plus I think AMD released a written response to it. A bit of Googling should find it.

 
Prime finally ran for 8 1/2 hours!! I changed my memory settings to 2.3.2.10-1T and it ran all night!

Now I have to find out why my X800XTPE is artifacting at stock speeds with ATITool!
 
Actually, after reading those threads, that makes a lot of sense. Prime95 is *very* memory-intensive, much moreso than 3DMark (GPU + CPU), or encoding (CPU + mem). So if you overclock, because the memory-controller is on the CPU itself, then the memory signals are being powered by the CPU. Overclocking the CPU causes it to draw more power, leaving less to power the memory-controller lines, etc. Attempting to heavily-exercise those signal lines at the same time, is bound to cause problems. So either slow down the memory timings, or increase the voltage (CPU and/or RAM), or both. I guess that's another 'ceiling' to watch out for, when OC'ing A64 chips.
 
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