Topic Title: 7950 overclocking
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Created On: 03/09/2012 01:27 PM
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 03/09/2012 01:27 PM
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Hi, I am attempting to overclock my gigabyte 7950's in crossfire (which I hear overclock like a beast). Every time I move the slider for the frequency up even a little bit I have stability problems and no game will play. I tried raising the voltage a little as well with no luck. so I have two questions:

1. Is it possible to overclock in crossfire mode and if so what am I doing wrong?

2. What is a surefire test to make sure a graphics card isn't faulty?


* I forgot to add that my PSU is a Corsair HX 1050 watt, CPU is a i5 2500k oc'd to 4.5 ghz, and mobo is an asrock prof fatality gen 3.

 03/09/2012 02:44 PM
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Polygon Pusher

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Try Individually overclocking the cards with crossfire disabled or the other card removed and see what luck you have. 

Have you tried MSI afterburner? Or are you just useing VECC.


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 03/09/2012 03:32 PM
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Farming Materials

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For OCing tests, use Furmark, Heaven, or any other program.. I use Furmark to test my OCs on my cards..

2 identical cards never OC the same, so maybe doing it on CFx is causing the crashes, so like Vantharas told you, test one by one..

Use MSI AfterBurner to do the OC, like this: move the slider to increase, let's say, 5-10Mhz, save, and run Furmark (or the program you have chosen).. If artifacts/blue screens shows up, that's the limit and you have to step back.. Of course, this is on each card, not CFx..

Sorry can't be more helpful on the CFx OCing, but I only have one card, and always have.. But for the OC, sure..


Best regards..


8320 @ 4,7 / 990FXA UD5 / CF-X 7970 + 7950 / Switch 810 / H110 p-p / 16 GB RAM / 23" 5760x1080 / SSD 64GB RAID0 / HX750 / SB Recon3D Fatal1ty Champion / z506

 03/09/2012 06:01 PM
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Okay thanks for the suggestions. I am just hoping my cards aren't faulty as I was getting unusually low framerates in some games. Just cause 2 dark tower benchmark only averaged 40 fps with all settings maxed and vsync off. I never got any artifacts or weird things like that though...

 03/09/2012 06:11 PM
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80 Column Mind

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Just because your card can't overclock doesn't make it faulty, product binning makes overclocking possible and is not a guarantee that a card will be able to overclock, it means that any given card is guaranteed to work at the frequencies set to it by the manufacturer.

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