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Overclocking GPU's

Lays
By Lays
in Graphics Cards
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I've always wondered, why is it CPU's can overclock sometimes as much as 3+ ghz, and GPU's can only overclock a few hundered Mhz?

 

 

Stuff:  i7 7700k @ (dat nibba succ) | ASRock Z170M OC Formula | G.Skill TridentZ 3600 c16 | EKWB 1080 @ 2100 mhz  |  Acer X34 Predator | R4 | EVGA 1000 P2 | 1080mm Radiator Custom Loop | HD800 + Audio-GD NFB-11 | 850 Evo 1TB | 840 Pro 256GB | 3TB WD Blue | 2TB Barracuda

Hwbot: http://hwbot.org/user/lays/ 

FireStrike 980 ti @ 1800 Mhz http://hwbot.org/submission/3183338 http://www.3dmark.com/3dm/11574089

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I have no idea. I think it has something to do with the slot type for factor of the cards which is horribly inefficient at removing heat from the system. While a Cpu can easily fit a $30 tower cooler and improve temps massively. You can't just slap a tower cooler on a gpu sadly.

I wish I could get my 7950 stable past 950mhz. Any recommendations on making it more stable are welcome?

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