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On current OC attempt, 2nd worker keeps failing in p95

post #1 of 18
Thread Starter 
The 2nd worker keeps failing on the various combo's of volts I've been trying for CPU, CPU/NB, RAM.

with 310FSB
x11.5 @1.43125 CPU
x9 @1.41875 CPU/NB
1653 @1.625 RAM on 1.35V rated eco's

that worked for 2h5m @47C, until I stopped it, and I think I was upping the CPU that got it to work

now with 315FSB and up to these volts and combo's from the above volts

x11.5 @1.4625 CPU
x9 @1.425 CPU/NB
1680 @1.65 RAM

the 2nd worker always fails in about 1m, the temps only get to about 43C by that time

Any thoughts, I've overcome this problem before where the same worker kept failing.

So between that core, and whatever part of the ram it talks to, it fails.
But I'm writting from windows now, and it only locked up once in about 8 p95 runs, the others I just stopped and rebooted.
Edited by Mit Namso - 2/10/11 at 11:41pm
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post #2 of 18
Quote:
Originally Posted by Mit Namso View Post
The 2nd worker keeps failing on the various combo's of volts I've been trying for CPU, CPU/NB, RAM.

with 310FSB
x11.5 @1.43125 CPU
x9 @1.41875 CPU/NB
1653 @1.625 RAM on 1.35V rated eco's

that worked for 2h5m @47C, until I stopped it, and I think I was upping the CPU that got it to work

now with 315FSB and up to these volts and combo's from the above volts

x11.5 @1.4625 CPU
x9 @1.425 CPU/NB
1680 @1.65 RAM

the 2nd worker always fails in about 1m, the temps only get to about 43C by that time

Any thoughts, I've overcome this problem before where the same worker kept failing.

So between that core, and whatever part of the ram it talks to, it fails.
But I'm writting from windows now, and it only locked up once in about 8 p95 runs, the others I just stopped and rebooted.

Try to decrease FSB n up the multiplier .
post #3 of 18
Thread Starter 
I'm working on OCs with higher FSB and lower multipliers, because I only started trying that type a couple of days ago.
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post #4 of 18
it's the ram.
Lower the freq, or give it more volts, or upper the timmings.

PS: Stop raising your FSB, you'll get nothing but instability. Leave it at 310 if that works for you and start upping the multiplier
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post #5 of 18
The FSB you refer to is actually just the reference clock used to calculate all associated clock speeds...HT link, CPU, IMC, and RAM.

Increasing the clock speeds with the reference clock can be fun and help you squeeze an extra bit of stable power out of your system...for example, you may achieve 3.5 stable but become unstable at 3.6 using only multipliers, while you may be able to achieve small incremental increases with the reference clock, like 3.55...which would be slightly faster than 3.5.

I confused myself with that example above, but the point is you should overclock with multipliers under all but two conditions: 1) You want to squeeze that extra ~50mhz out of your CPU/IMC/RAM or 2) You are doing it simply because you want to try it.

I achieved all my best stable overclocks using the reference clock, though I achieved my highest (though instable due to heat) clocks using multipliers alone.

Choice is yours, but thought I'd clear the air for anyone who reads this...

Also, see my overclock guide for more information.
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post #6 of 18
Quote:
Originally Posted by PeL4 View Post
it's the ram.
Lower the freq, or give it more volts, or upper the timmings.

PS: Stop raising your FSB, you'll get nothing but instability. Leave it at 310 if that works for you and start upping the multiplier
^^This

I'm just using the multi and 211 bus speed to reach my 2954Mhz CPUNB. It always failed on the 2nd core after 2 mins untill i had the correct balance between RAM voltage and CPUNB voltage. Tough it still fails after 3h34min but I'll do a new attempt at 3000Mhz+ when i get my WC setup.

Higher voltage on ram/cpunb does not necessary mean more stability, infact to get it to be stable 3h34min i had to drop my ram voltage from 1.729 to 1.683
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post #7 of 18
Quote:
Originally Posted by Mit Namso View Post
The 2nd worker keeps failing on the various combo's of volts I've been trying for CPU, CPU/NB, RAM.

with 310FSB
x11.5 @1.43125 CPU
x9 @1.41875 CPU/NB
1653 @1.625 RAM on 1.35V rated eco's

that worked for 2h5m @47C, until I stopped it, and I think I was upping the CPU that got it to work

now with 315FSB and up to these volts and combo's from the above volts

x11.5 @1.4625 CPU
x9 @1.425 CPU/NB
1680 @1.65 RAM

the 2nd worker always fails in about 1m, the temps only get to about 43C by that time

Any thoughts, I've overcome this problem before where the same worker kept failing.

So between that core, and whatever part of the ram it talks to, it fails.
But I'm writting from windows now, and it only locked up once in about 8 p95 runs, the others I just stopped and rebooted.
Am i seeing this correctly?!?!? reference clock of 311?? Why does this not seem right? Another way for us to help you would be a CPU-z shot, with a second having your memory tab open.

I could never get my reference clock stable over 250. even with a buttload of voltage
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post #8 of 18
The max reference clock depends on what motherboard you have ofc. Without increasing NB voltage (on my board it's actually mGPU Voltage ...) i can get 290. Bumping the voltage up 2 bumps and i can get 318. But yeah you shouldn't be running 311 fsb if you have an unlocked multi ... it just gives you more *problems*
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post #9 of 18
Thread Starter 
Yeah I think its the RAM, or the CPU/NB, because when I p95 with the small FFT that don't use RAM its runs for a while, longest I left it running was 1/2h.

But on blend, the other one, and especially custom(that I was running mainly, with 2800MB RAM) the 2nd worker fails in about a minute.
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post #10 of 18
So the same problem i had 2 days ago Just lower/up your ram voltage a bump and try again. Same with CPUNB voltage.

But even then use a higher multi/lower fsb.
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