One of my cores fails Prime95 at defaults.

Rilot

Rilot

Rilot

Don
Joined
18 Oct 2002
Posts
23,566
Location
Wargrave, UK
Before I start OCing, I'm stability testing my rig with everything at defaults.
I have a Q6600 G0 and an Asus P5K Premium. 2 x 2GB OCZ Reaper 6400.
When I run Prime95, core 2 always fails after about 2 minutes. I've upped the RAM voltage to the manufacturers recommended setting but it's still crashing out.
Any ideas? Could I have a duff Q6600 with a dud core?
 
You could try running memtest to rule out faulty ram. Also try updating your motherboard bios as a similar thing happened to me and flashing my bios fixed it. Good luck :)
 
S&M is good for isolating the problem. It tests RAM CPU cores, cache etc separately. Be warned, it will get your CPU a lot hotter than Prime95 when carrying out the floating point test.
 
I ran Memtest86 over night a couple of days ago. no errors.

I'll try S&M to see if it can shed any light on the issue. I'll also try a bios flash.
 
Rilot said:
Before I start OCing, I'm stability testing my rig with everything at defaults.
I have a Q6600 G0 and an Asus P5K Premium. 2 x 2GB OCZ Reaper 6400.
When I run Prime95, core 2 always fails after about 2 minutes. I've upped the RAM voltage to the manufacturers recommended setting but it's still crashing out.
Any ideas? Could I have a duff Q6600 with a dud core?
Click to expand...

What temps are you getting on the cores?
 
It's looking like it's memory.
S&M under the FPU test gets the cores to a perfectly acceptable 47 degrees with CoreTemp. It passes all the CPU and Cache tests on all 4 cores no problem.
When it got to the memory test, the application crashed half way through.
I shall go back to Memtest86 tonight and see if it throws anything up. If it does, I'll slacken the timings and see where that gets me.
 
OK, it passes 1 run of memtest86. I'm going to leave it for 12 hours and see what happens.
 
OK, I'm stuck:
Memtest86 - 24hrs running, no errors
S&M - 6 hours of loop, no errors
Prime95 - Fails after 5 minutes on a random core

Any ideas?
 
Prime95 hates you? :p But seriously, if its stable in other stress testing software then maybe its just a bug in something. I would either see if it goes away when its clocked or maybe try it in a mates/spare/random strangers rig to check its not something else.

PK!
 
That's a good sign. Passing a 2 hour run of OCCT usually means that you'll pass, or are very close to passing an 8 hour run of Prime95.
 
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