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Do I need a better stress test?

post #1 of 14
Thread Starter 
So I've had my 6950 for a while now (2 weeks) and I run it at 810Mhz (stock) most of the time but for gaming I started using 830Mhz and then moved onto 860Mhz which all seemed to work great, no artifacts that I noticed. I also stress with MSI Kombuster.

I decided to up it to 870Mhz and run the Kombuster Extreme Bench to stress it and I'm like 90% sure there were no artifacts but I may have missed them.. I'm new to this.

My concern is I'm doing it wrong.. 870 seems pretty high for stock voltage (1.1V). Its a DCUII cooler and i have the fan curve set to really take off if temperatures get very high so its staying cool. Should I be stressing this harder? If so How? How high can a 6950 on stock volts go?




Cheers for any answers
Edited by olliiee - 10/15/11 at 6:22pm
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post #2 of 14
Quote:
Originally Posted by olliiee View Post
So I've had my 6950 for a while now (2 weeks) and I run it at 810Mhz (stock) most of the time but for gaming I started using 830Mhz and then moved onto 860Mhz which all seemed to work great, no artifacts that I noticed. I also stress with MSI Kombuster.

I decided to up it to 870Mhz and run the Kombuster Extreme Bench to stress it and I'm like 90% sure there were no artifacts but I may have missed them.. I'm new to this.

My concern is I'm doing it wrong.. 870 seems pretty high for stock voltage (1.1V). Its a DCUII cooler and i have the fan curve set to really take off if temperatures get very high so its staying cool. Should I be stressing this harder? If so How? How high can a 6950 on stock volts go?

Cheers for any answers
It looks good on stock voltage and temp is amazing too. As every chip is different, you could try to increase core each time by 5MHz and run the test. Use small increament at the limit of stock voltage to avoid BSOD. Artifacts, stutter or throttling is where I would stop. Avoid hard crash such as BSODs on a daily gaming rig, it will corrupt something along the way. For real benching tweak, use a dedicated drive.

You can stress or check for error using OCCT and apps like Heaven, 3DMark 11, Furmark, Kombustor but most importantly test the OC with all the games you are playing. Games like Metro 2033 will stress GPU more than any stress test. If it fails, back down the clocks by 5 Mhz or increase voltage by 10mV and try again (not in this case).

Overall your 6950 is doing great from what I see.
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post #3 of 14
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
It looks good on stock voltage and temp is amazing too. As every chip is different, you could try to increase core each time by 5MHz and run the test. Use small increament at the limit of stock voltage to avoid BSOD. Artifacts, stutter or throttling is where I would stop. Avoid hard crash such as BSODs on a daily gaming rig, it will corrupt something along the way. For real benching tweak, use a dedicated drive.

You can stress or check for error using OCCT and apps like Heaven, 3DMark 11, Furmark, Kombustor but most importantly test the OC with all the games you are playing. Games like Metro 2033 will stress GPU more than any stress test. If it fails, back down the clocks by 5 Mhz or increase voltage by 10mV and try again (not in this case).

Overall your 6950 is doing great from what I see.
Sweet thanks, lucky chip maybe. Well I ran the TechPowerup GPU tool which as a rendering thing to test for artifacts (it was in the OCing guide) and the only errors I got were when I tried moving the box around the screen on its own no errors were found.
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post #4 of 14
Thread Starter 
Alright so I followed my method and now I'm at 900Mhz at 1.1V and I'm yet to see artifacting but I'll try some games soon.

My concern now is my temperature..

I read this: http://www.geeks3d.com/20110202/test...verclocking/6/

and they get like 80C temps.. I wasnt even seeing >63 at 880 and below and at 900 I saw it go up to 65 (the highest I've ever seen it go) after I threw my fan profile off in an attempt to test to see if the temperature increased.. My ambient is like 22 degrees. I also monitoed temps on AB and ASUS SD. Might I have a faulty temp sensor?

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post #5 of 14
Thread Starter 
bump for help please guys :/
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post #6 of 14
That's the best of the stock cooler can do or you can try to re-apply thermal paste if it will lower the temperatures. That's the limitation when you overclock simply on air, you can not push as high as you want.
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post #7 of 14
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Quote:
Originally Posted by Ken1649 View Post
That's the best of the stock cooler can do or you can try to re-apply thermal paste if it will lower the temperatures. That's the limitation when you overclock simply on air, you can not push as high as you want.
I don't have a stock cooler, I have a DCUII my concern is that review is done with a similar card but mine gets waaaaay lower temps (like 20 degrees) so I'm worried the temp censor is incorrect.
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post #8 of 14
If you are so afraid of the benchmark use being too weak. Go Furmark and rape the card. Heaven is what I use. 80 degrees is nothing, go higher, though it will be too loud for my comfort.
    
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post #9 of 14
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Quote:
Originally Posted by sloppyjoe123 View Post
If you are so afraid of the benchmark use being too weak. Go Furmark and rape the card. Heaven is what I use. 80 degrees is nothing, go higher, though it will be too loud for my comfort.
Yeah I'll try Heaven thanks for the suggestion

I feel like I didnt really explain clearly what I meant..

That review, similar card but 2GB - 83 degrees at 900Mhz
My card, same card but 1GB - 63 degrees at 900Mhz

So I'm worried my tempt censor is wrong..
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post #10 of 14
Quote:
Originally Posted by olliiee View Post
I don't have a stock cooler, I have a DCUII my concern is that review is done with a similar card but mine gets waaaaay lower temps (like 20 degrees) so I'm worried the temp censor is incorrect.
I don't think the sensor is defective or incorrect. The worst is the thermal paste was not properly applied. You can clean the stock paste and reapply with MX-3/MX-4. Also, to compare your temp with that review might not accurate, the ambient and Furmark version, settings and fan speed could be different from yours.
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