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~~The GTX 670 Overclocking Master-Guide~~ - Page 201

post #2001 of 3357
You should never run K-Boost. It is pointless and just runs your card high for no reason. If your card needs to run high it will do it automatically, otherwise it will clock down to what is needed at that time. There are also known issues when turning it on and they tell you to turn it off before installing new drivers etc.
post #2002 of 3357
Followed the guide and it worked pretty nicely. Also allowed me to figure out a few things and develop my own overclocking methodology, which is a slight variant on the guidelines presented here. Thanks again for the great guide!

Now that I seem to have found pretty decent stable overclocks for both my cards, I do have a few questions that still aren't clear to me. Maybe I missed the explanations?

The voltage slider. I maxxed it while overclocking, as instructed. But I'm not sure: does it set a voltage that the card WILL go to when under load? Or does it set a max voltage that it can jump to? My voltage did always jump to the max when I was tinkering, but will it always do that under load or was it because the loads were so extreme?

Also, I seem to recall that the voltage control is technically a separate application. If that's correct, does it reset every time it closes, or will checking the "Windows Start Up" box also preserve the voltage setting?

Ditto for fan profiles, are they saved as well? I seem to recall someone stating that Precision-X has to be running for the fan curves to be active. That seems odd, but is it right?

Thanks,
JML
post #2003 of 3357
Quote:
Originally Posted by JML10166 View Post

The voltage slider. I maxxed it while overclocking, as instructed. But I'm not sure: does it set a voltage that the card WILL go to when under load? Or does it set a max voltage that it can jump to? My voltage did always jump to the max when I was tinkering, but will it always do that under load or was it because the loads were so extreme?

Also, I seem to recall that the voltage control is technically a separate application. If that's correct, does it reset every time it closes, or will checking the "Windows Start Up" box also preserve the voltage setting?

Ditto for fan profiles, are they saved as well? I seem to recall someone stating that Precision-X has to be running for the fan curves to be active. That seems odd, but is it right?

Thanks,
JML

I honestly don't see the need to set your voltage on the card unless you are having issues with it fluctuating under load and causing you to be unstable. For me at least, the voltage stays at 1.175 when it is under full load and drops down when it is not needed just using the default voltage setting. Now, this may not be the same for all cards and if you feel that leaving it higher will makes you more stable then do so.

In older versions of Precision and After Burner, the voltage always seemed to reset itself, but I believe in newer versions that we're able to save what you had. Now, none of this will actually be used unless you are running the application. So, to have it automatically start you need to check the start on windows option.

I believe the fan profiles are the same as the above mentioned.
post #2004 of 3357
Um...

So, the voltage control sets the voltage, or sets a max? That's what I'm asking.

And the "Windows Start Up" actually launches the application, rather than just making the settings active on the cards?

In a nutshell, these are the questions I'm just trying to get straight forward answers on.

Thanks,
JML
post #2005 of 3357
W00T!!!

How many times can I say THANKS for this guide? Well, consider this one more. thumb.gif

Here are my final results. The system seems stable at these numbers and with these results.

CPU: Intel Core-i7 3930K @ 4.5MHz
GPUs: EVGA GTX 670 FTW 4GB, 2x SLI
GPU Max Core = 1254MHz, GPU Memory = 3604MHz, GPU Max Temp = 72 degrees, GPU Max TPD = 128%
Note: Clock did NOT throttle down when temps crossed 70 degrees

Heaven 4.0, SLI scaling = 94.5%



3DMark11 Performance, SLI scaling = 92.3%



3DMark11 Extreme, SLI scaling = 94.1%



I'm pretty happy for my first time overclocking video cards. biggrin.gif Thanks to all who have offered advice and answered questions, in addition to this most helpful guide.

JML
post #2006 of 3357
Quote:
Originally Posted by JML10166 View Post

Um...

So, the voltage control sets the voltage, or sets a max? That's what I'm asking.

And the "Windows Start Up" actually launches the application, rather than just making the settings active on the cards?

In a nutshell, these are the questions I'm just trying to get straight forward answers on.

Thanks,
JML

On most cards the voltage control just keeps the voltage from dropping when the card throttles, it doesn't change the actual voltage going to the card, which is locked to 1.175 unless you mod the BIOS.

And the apply at startup command doesn't automatically run the application, it just applies the settings. Once you set it you don't need the application running any longer since it makes the changes at the driver level.
post #2007 of 3357
14.6k Physics score at 4.5Ghz? Im only getting 9.2k on my 2600K at 4.8Ghz.. so something is wrong with my setup or my CPU is probably under performing? ( no throttling )


Another thing on my GPU, not sure if this is caused by MSI-AB but there are times that my card does not properly accept the offset GPU values and just locks it self to 1006Mhz core but it bumps the memory, temps are well under 60c
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post #2008 of 3357
Quote:
Originally Posted by EarlZ View Post

14.6k Physics score at 4.5Ghz? Im only getting 9.2k on my 2600K at 4.8Ghz.. so something is wrong with my setup or my CPU is probably under performing? ( no throttling )


Another thing on my GPU, not sure if this is caused by MSI-AB but there are times that my card does not properly accept the offset GPU values and just locks it self to 1006Mhz core but it bumps the memory, temps are well under 60c
Quote:
Originally Posted by EarlZ View Post

14.6k Physics score at 4.5Ghz? Im only getting 9.2k on my 2600K at 4.8Ghz.. so something is wrong with my setup or my CPU is probably under performing? ( no throttling )


Another thing on my GPU, not sure if this is caused by MSI-AB but there are times that my card does not properly accept the offset GPU values and just locks it self to 1006Mhz core but it bumps the memory, temps are well under 60c
No mate, he's using a hexcore, your CPU is fine
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post #2009 of 3357
Ive seen some 2600K's that also do about 11-12k at the same or lower clock speeds.. is 9200 really the expected CPU score for Physics?
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post #2010 of 3357
Quote:
Originally Posted by Forceman View Post

Turning the power slider up all the way is fine, but increasing the voltage is going to make it harder to keep cool, so you might be better off putting that back to stock.
Yup now I set it back to stock smile.gif thx Forceman.

Quote:
Originally Posted by iRandomize View Post

Considering you are running on an "Acrylic Benchtable", either your ambients must be rediculously high, the JetStream cooler impressingly inefficient, or your card broken. It is a dual-fan cooler :S. The stock cooler can manage to keep the GPU below 70C without voltage mod... I would probably try replacing the thermal paste on that one!

You NEED to stay below 70C. You can safely max both the voltage and power sliders.
With modified fan curve I can get max temp under 70c but only at stock clock, when comes to OC it will goes beyond 70c, I live in a HOT country so I can't hold this higher temp while OCing unless I got an AC in my room biggrin.gif
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