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Overclocking Sapphire HD 7950

Last response: in Overclocking
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October 7, 2013 6:36:35 AM

So I bought this VGA last week, and I'm overclocking it with Sapphire Trixx software.
For default it is:
925mhz core
1250mhz memory
1250v
power slide 0

More info:

CPU AMD FX-8350 @4.6Ghz(Stable)
Gigabyte GA-970A-UD3
2x 4GB RAM @1600Mhz
Windows 8.1 at Kingston SSD
1TB WD Sata 3

Well, at 3d Mark 11 and Unigine Valley I was able to raise it up to 1150/1575, with the same 1250v and power slide +20. It was stable.
However, when I run Crysis(2007) and Crysis 2 I got crashes.
What am I doing wrong? I already saw plenty of better clocks here at Tom's, using same or even lesses voltage tweaks...
Thanks, I appreciate your help.

Best solution

a b K Overclocking
October 7, 2013 6:54:51 AM

Every card is different. Just because someone can overclock to x speed at y voltage doesn't mean you can. You may need more (or possibly less) voltage than them. Just change the clock a little a time and test for stability/temperature and push up the voltage as needed. Oh and you need to max out the power limit when you start overclocking. It basiclly just lets the card use more power if needed.
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October 7, 2013 7:02:31 AM

wanderer11 said:
Every card is different. Just because someone can overclock to x speed at y voltage doesn't mean you can. You may need more (or possibly less) voltage than them. Just change the clock a little a time and test for stability/temperature and push up the voltage as needed. Oh and you need to max out the power limit when you start overclocking. It basiclly just lets the card use more power if needed.

Well, then it may just be a "bad sample"? I'm usually lucky as that...
Anyway, the power limit is at it's max. About the voltage, is there a possibility that 1250v is too much to the point of disturbing my performance?
Also, I find it very weird that the card remains stable at 3d mark 11 and Unigine Valley/Heaven and crashes at a "old" game like Crysis...
Anyone have any idea?
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a b K Overclocking
October 7, 2013 8:17:27 AM

I don't know anything about 7950 voltage sorry. As far as stability goes you should only use the benchmarks to give you a rough estimate. The only sure way to test stability is to play gpu heavy games, like Crysis.
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