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Overclocking Stability

Natursvin
By Natursvin
in Graphics Cards
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Hallo i have been trying to overclock my sapphire 7970 vapor-x but i cant get it past 1135 Mhz which is quite low based on a little reading. So my theory is that it might have something to do whit my power supply its a Silver Power SP-SS650 650W. What i have read is that is uses four 12 volts rails and that the studdering is a little high. Ive been looking at the Corsair AX 760 PSU as an replacement. so i was wondering if you guys think that is would help the GPU stability or if i have just been unlucky whit my chip.

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1135mhz on stock volt? or overvolted?

| Intel i7-3770@4.2Ghz | Asus Z77-V | Zotac 980 Ti Amp! Omega | DDR3 1800mhz 4GB x4 | 300GB Intel DC S3500 SSD | 512GB Plextor M5 Pro | 2x 1TB WD Blue HDD |
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