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post #51 of 53
The HD7970/280X is rated 250W TDP. At stock clocks they use a lot less than this under normal workloads, but overclocked that high, they can easily exceed 250W peak power consumption. (up to 275W is not unheard of for peak-draw under GPGPU workloads).

The Competing Kepler isn't much less (GTX770), with "peak" power consumption overclocked with stock BIOS able to hit peaks of ~250W. Or up to 400W on custom BIOS.
     
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post #52 of 53
Quote:
The Competing Kepler isn't much less (GTX770), with "peak" power consumption overclocked with stock BIOS able to hit peaks of ~250W.

Yea, but at maximum overclock, actual gaming power consumption averages like.. 180 watts. I've heard GPGPU loads to be higher and hd7k consuming more, especially compared to voltage locked kepler but 50% more is a lot biggrin.gif
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post #53 of 53
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Example of bottle necking^^^^ when the video card was underclocked to the same respects of cpu (was pulling 30-40 fps)




and this was with vga at default clocks, as you can see usage is at 39% with about 40-45 frames
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