Corsair XMS 3200 & MSI K8N Neo2 Plat Problems

[Lothar]

Hi guys, I've got myself the new Zalman CNPS 9500 cooler and decided to squeeze some extra juice from my system:

AMD64 3000+ Winchester - 2004/week33
MSI K8N Neo2 Platinum - Latest bios
Corsair XMS3200 C2PRO TwinX - 2 x 512mb
AOpen 500W, etc

Now the Winnie runs fine at 225FSB at 1.42V and below 42'C with Prime95 stable for 5hours, BUT the ram divider was on 166 (coz I first wanted to check that the CPU was ok with 225)

When I set the divider back to 200, I get instability error from Prime not 2 minutes into the Torture test. I then raised the vdimm to 2.7V and this time it was 19 minutes before the errors came. So I raised them to 2.8V and it was 58minutes before I got errors. I have the vdimm now on 2.85V which is the max and Prime is running for 30 minutes so far.

The timings is 3-3-3-8. Am I doing something wrong? This is my first OC so I might forgot even the simplist and easiest thing.

Please help me

[Lothar]

I've upped the Vdimm to 2.8 and now Prime95 can run stable for about an hour and a half before I get the error :

FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.

Any Ideas?

[shuRe]

:welcome: Welcome to the Forums :welcome

Sorry noone has got back to you, this forum has a nag of being hungry for results without providing help :(

but neways, its obviously helping your stability raising the vdimm on the ram. I have corsair 3200LL with TCCD chips (which is rare) and they like 2.9vdimm the most.

What you could do is put on a 5/6 divider that would eliminate the memory as a problem, then prime the cpu, increasing the htt to 250 or something with the multiplier set at 9.

If this fails, then raise the vcore about 0.02 vcore, from 1.4 to 1.42 etc, then try again. Repeat this proccess of rasing vcore at a resonable o/c (something like 260x9) untill you reach 1.6vcore or 50C load temps. Remeber that you still have the 5/6 divider at this time as you are looking for the maximum cpu overclock.

Once you have found a stable cpu o/c that is prime stable for 12-24 hours (depending on how picky you are for 24/7 o/c) then you can reduce the divider so your memory runs at a higher fsb. Once again run memtest86 or prime95 after 5-10mhz increasements in you memory fsb, keeping the timings at 3-3-3-8 or whatever they are rated.

One thing that might help (but invalid your warrenty) is removing the ram heatspreaders by gently prying them off, so that you can tell us what chips are on your ram.

Feel free to ask more Q's if i havnt explained it clearly enough.