AMD R9 Nano Performance Indirectly Revealed

71540476

不知真假啊

http://wccftech.com/fast-amd-radeon-r9-nano-find/




Since we know that performance per watt is FP32/TDP, we can go ahead and extrapolate the power efficiency of the R9 290X.

R9 290X’s peak FP32 = 5.6 TFLOPs, in other words 5600 GFLOPs, and its TDP is 250W.

Perf/W = 5600 GFLOPs/250W = 22.4 GFLOPs/W

We also know that the R9 Nano has 2X the perf/watt of the R9 290X.

Which means it’s 2X (5.6TFLOP/250W)
= 2X 22.4 GFLOPs/W
= 44.8 GFLOPs/W.

Thus the perf/watt rating of the R9 Nano is 44.8GFLOPs/W.

Incidentally we also have the TDP for the Nano, and that’s the last missing piece in the puzzle.

R9 Nano
Perf/watt = FP32 in GFLOPs (unknown) / TDP (175)
44.8 = FP32 (unknown) / 175
44.8 x 175 = FP32 (unknown)
44.8 x 175 = 7840 GFLOPs or 7.84 TFLOPs.