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post #8381 of 10417
Quote:
Originally Posted by u3b3rg33k View Post

odd - 23x.

If it is the i7-940 in your sig, this is likely the reason you have issues going higher than 3.8GHz.
On that CPU, the x23 multiplier is turbo mode, and will cause stability issues when overclocking.

Try the x21 multiplier, and a higher bclock speed, like 190.
Be sure you also disable the Turbo mode in the advanced CPU settings in your BIOS.
It may also be helpful to turn off SpeedStep tech, C States, and both spread spectrum options.

For voltages, I'd start off with 1.3v for the CPU Voltage, 1.25v for the QPI/DRAM Core Voltage, and 1.5v for the DRAM Bus Voltage(never more than 1.65v on the DRAM Bus), leave the rest on auto.
That should get to 4 GHz stable if there are no issues with your hardware. You could likely get away with slightly lower CPU and QPI/DRAM voltages, but I prefer hitting something stable, then working my way down, than trying to work my way up to stable voltage settings.

Once it is stable at 4 GHz, you can go for higher by raising the bclock, but you may have to lower the QPI and/or memory multipliers(displayed as their calculated speeds in your motherboards BIOS) to be stable.
Edited by Caleal - 10/20/12 at 5:12pm
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post #8382 of 10417
Hey guys, I promised I wouldn't be a pest in your team thread, but I REALLY need some help. I'm overclocking my new Asus GTX560 DCII TOP and I don't know when to stop. Here is my current clock:




I'm folding 100% stable. But I don't know what the warning signs are for too high of an overclock. I've searched and posted a thread and even went to another site. No answers. Any advice?
post #8383 of 10417
When you start seeing failed units. Or GPU load is 0% even though your client says it's folding.
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post #8384 of 10417
Quote:
Originally Posted by 4thKor View Post

I'm folding 100% stable. But I don't know what the warning signs are for too high of an overclock.

The warning signs are either failed work units, or an acrid burning smell! biggrin.gif

The acrid burning smell sign is highly unlikely at any settings the stock BIOS will allow you to select in an overclock utility.

If you have a modified BIOS flashed on your card, letting the smoke out becomes a much more serious possibility. wink.gif
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post #8385 of 10417
Quote:
Originally Posted by Krusher33 View Post

When you start seeing failed units. Or GPU load is 0% even though your client says it's folding.

I have noticed my PPD's dropped off after the last increase. So maybe I've reached my limit.
post #8386 of 10417
Quote:
Originally Posted by 4thKor View Post

I have noticed my PPD's dropped off after the last increase. So maybe I've reached my limit.

On the same work units, or on different ones?
There are currently 4 different work unit types being assigned to Fermi cards, the PPD difference between them is very significant.
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post #8387 of 10417
Quote:
Originally Posted by Caleal View Post

On the same work units, or on different ones?
There are currently 4 different work unit types being assigned to Fermi cards, the PPD difference between them is very significant.

lachen.gif
You're not kidding.
Edited by jesusboots - 10/20/12 at 5:58pm
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post #8388 of 10417
I'm doing the overclock on a 7625. I've backed it back off one "notch", my PPD's went back up, so I think I'll leave it alone until I get some different WU's and see how it behaves. I had a gamer tell me I was gonna' blow it up (never Folded in his life). Am I running it too high?
post #8389 of 10417
doubloski! doh.gif
Edited by Caleal - 10/20/12 at 6:11pm
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post #8390 of 10417
If your PPD goes down at a higher setting, you could be running into some thermal throttling, or be on the verge of failing the work unit.
Quote:
Originally Posted by 4thKor View Post

Am I running it too high?

Of course not!

Then again, when it comes to high overclocks or spicy food, I'm not always the best person to ask the opinion of, as my comfort zone is typically higher than most people's. wink.gif

Quote:
Originally Posted by jesusboots View Post

lachen.gif
You're not kidding.

whistle.gif
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