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Overlocked 5970, Furmark FPS inconsistent.

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February 5, 2010 2:14:37 AM

Okay on stock 5970 725/1000:

Furmark stability test , 640x480 NO AA: I get 329 MAX FPS..

Overclocked to 900/1225 w/ increased GPU Voltage (not memory): I get 368 MAX.

Overclocked to 906/1251 w/ increased GPU Voltage (not memory): I get 360 MAX.

The question is: Is Furmark FPS reliable for resting overclock or should I stick with 3d Vantage?

Thanks in advance.
a b K Overclocking
February 5, 2010 10:21:17 AM

Why would you only look at max FPS? The goal of benchmarking is the average FPS. As long as that is consistent, that's all you need.

Max/Min FPS could have only been present for a second and never reach that high/low point ever again for the whole test. So again, as long as you see an increase in avg FPS, then keep going at it.
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February 7, 2010 8:15:28 AM

Sorry for the reply. Thanks, PSU just died on me and had to get a new one.
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February 7, 2010 11:35:59 AM

Also, there are several protection mechanisms built into the 5000 series cards. As one clocks higher and higher it seems as if the card slows down - there is a wall.

You didnt mention heat levels on your card - 900/1200 is pretty high on that card on air.

Many overclockers up the voltage/clocks and see what is happening to the various benchmarks - not just one. As soon as they flatten they have reached the cards limit and either stop or back off a little. People on air will see those limits much sooner - air simply cannot get rid of that much heat fast enough - even with that fan at 100%
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February 21, 2010 6:06:45 PM

640 X 480 why would you do that resolution NO ONE else benches at this resolution, try 1240 X 1024, and what you want is average NOT max, besides thats not really an oveclock its like 2%
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a b U Graphics card
a b } Memory
a b K Overclocking
February 21, 2010 6:11:41 PM

Graphics cards drop in performance if you push them past their limit.
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a b U Graphics card
a b } Memory
February 21, 2010 8:39:44 PM

Furmark isn't a good benchmark. Try something else.

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