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Sapphire 7970 wont go past 1125/1575mhz! - Page 2

post #11 of 13
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Quote:
Originally Posted by MegaHertz View Post

yeah that happens man smile.gif
not every cards read the same speeds, its like processors, some reach higher speeds than others.
Ah I see. I was just reaching for the 1200/1600 mark and I guess this card just cant quite make it. That's the silicon lottery for you. rolleyes.gif
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post #12 of 13
Quote:
Originally Posted by Insan1tyOne View Post

Ah I see. I was just reaching for the 1200/1600 mark and I guess this card just cant quite make it. That's the silicon lottery for you. rolleyes.gif


It's actually somewhat difficult to hit 1200 on air. You need good cooling to keep the core temps below 70c. Tahiti's overclocking capability is temperature limited, so the cooler you can get the card, the higher it will overclock.
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post #13 of 13
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Quote:
Originally Posted by tsm106 View Post

It's actually somewhat difficult to hit 1200 on air. You need good cooling to keep the core temps below 70c. Tahiti's overclocking capability is temperature limited, so the cooler you can get the card, the higher it will overclock.
Huh that's interesting. I had heard that but I didn't think it factored in as much as Kepler's temperature constraints. I think the highest temps. I've ever seen this gpu reach when on the 1200/1600 mark was between 68-73c.
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