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post #281 of 926
Quote:
Originally Posted by umgill45 View Post
I have a Zotac GTX 480 with a stock Zotac BIOS and for some reason my "Core clock" slider is greyed out on AB Beta 5.

Does anyone have this problem.
My voltage slider is unlocked and showing "987mv".
Can someone please help me figure out how to increase the core clock on my card.

Thanks
Beta 6 uses the core and not the shader but it doesn't matter because the core/shader are locked together. If one changes the other does as well.
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post #282 of 926
Quote:
Originally Posted by saulin View Post
Beta 6 uses the core and not the shader but it doesn't matter because the core/shader are locked together. If one changes the other does as well.
thanks.
So when overclocking you're just increasing the core by 25 at a time and looking at the shaders/core speed in the graphs on the right side?

Is Kombustor and Furmark the best stabilty test for a gpu out there?
thanks
post #283 of 926
Quote:
Originally Posted by umgill45 View Post
thanks.
So when overclocking you're just increasing the core by 25 at a time and looking at the shaders/core speed in the graphs on the right side?

Is Kombustor and Furmark the best stabilty test for a gpu out there?
thanks
Yeah! I would go about 25Mhz at a time. I would start at 800Mhz Core on the GTX 480 with the default voltage and probably fan speed of 75-80%. Depending on your ambient temps you might need more fan speed to keep the card cool.

Then if 825 is not stable on default voltage, add a little. For example try 1.0625. Try to use the less voltage possible to keep the card cooler. I think 850 Core is the sweet spot on stock cooling with a little voltage. For 850 core you might need 1.1v.

Play with the fan. Furmark may get your temps to high 90s. Use the crysis benchmark to test stability and heat. For example run 30 loops at your highest resolution and 16xQ AA.

To watch for artifacts use the Vantage Benchmark or the AVP Benchmark. You will see them right away if they are there.

Oh yeah do the core overclock only first. Once you reached your stable overclock. Start overcloking the memory. try to overclock the memory without having to add extra voltage to get the best temps.

I did find out that I could do 850/1000 with just 1.1v, and 850/950 with 1.0625v. For my current clocks 900/1038 I need 1.138v.

I can do 875/1000 with 1.125v. BTW I can go higher because I have added extra cooling. My card at 900/1030 never hits 80C with fan speed of say 75-80%. I have A/C and I have 2 extra fans blowing on the card.
Edited by saulin - 5/31/10 at 4:06pm
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post #284 of 926
Thread Starter 
The most sensitive programs I have found are Kombustor(running for 45mins+ on a very high resolution) and call of duty 4. If you can run Kombustor on a high res and low res for over an hour, you won't have any problems gaming.

If you have call of duty 4, that's a great test also. Just run some sample records in a loop. COD4 is really sensitive compared to other games. Far Cry 2 will run for hours, for example, but COD4 will crash within minutes on my computer if it's the least bit unstable.
    
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post #285 of 926
thanks Chatch and saulin.

I'll report back with what I find out.

+1 reps to both of you for helping out a noobie.

Here's what I plan on doing:

1) 45 min. of Kombuster
2) 3dmark Vantage benchmark tests (I don't know how to loop this test but I'll run it for 30 min at 1920x1080 )
3) I have COD:MW2 I'll play that for 30 min.

If no artifacts I'll bump the core up from 775 to say 800 and test again.

I used to use Ati Tool for my gtx 260 but obviously things have changed a little.

Thanks again.
post #286 of 926
I've only tried Kombustor a couple times, so I'm not sure if it stresses the GPU any less than Furmark and EVGA OC Scanner, but I would be VERY careful running it for more than a few minutes on a 480. With OC Scanner, I can consistently hit 105C in less than 3 minutes at anything over 800 core. Sit there and watch the temps for several minutes to make sure they're not going to climb continuously.

Also noticed a bug reported in the latest release of Kombustor where it was apparently reporting PCB and not core temp in certain circumstances. I use OC Scanner instead, so I didn't investigate any further.
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post #287 of 926
Quote:
Originally Posted by prototype7 View Post
I've only tried Kombustor a couple times, so I'm not sure if it stresses the GPU any less than Furmark and EVGA OC Scanner, but I would be VERY careful running it for more than a few minutes on a 480. With OC Scanner, I can consistently hit 105C in less than 3 minutes at anything over 800 core. Sit there and watch the temps for several minutes to make sure they're not going to climb continuously.

Also noticed a bug reported in the latest release of Kombustor where it was apparently reporting PCB and not core temp in certain circumstances. I use OC Scanner instead, so I didn't investigate any further.
That's why I don't recommend Furmark, Kombustor, OCCT etc...

They just get the GPU way hotter than any game ever will. Plus don't do squad for stability in my findings. The Crysis benchmark is probably the best stability test I have found. If the card is not stable, the drivers will crash, the benchmark will lock up. Or you will see artifacts. Also Crysis seems to get the card as hot as it can get in games. Metro 2033 actually runs cooler than Crysis for me.
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post #288 of 926
Well, I'm not really getting anywhere with the PWM frequencies adjustments via the new beta EVGA E-Leet prog. I was able to get a stable 903core 2100mem OC finally after using the VGPU adjustment, something I couldn't do with AB. Still working on this OC though, I'm far from being temp limited.
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post #289 of 926
Hy everyone

Why i'm not able to flash my GTX470 with this bios ?
-> Best performing BIOS for GTX470 - also known as "grunion's ocx480 bios"
from the first post, I have try Nflash for dos, for windows and Extrem HD tuner too.

Can anyone help me with this ?

Thxs
post #290 of 926
What the difference in grunions' bios, exactly? Raising the default clocks won't be any different than just OCing to the same clocks. Does it allow for 480 voltages or something?
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