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nomad said:
Pemalite said:

Because there is more to a SoC than only the GPU. *yawn*
Remember the power consumption test that Anandtech did on *just* Tegra's GPU and it only consumed 1.5w of power? Yeah. Thought so.

You 've said the GPU has more TDP headroom. No,  it does not.

That 1.5W is a misenterpretation of data. The test was conducted with an underclocked GPU. The test was not to show how much the GPU consumes but how effecient it can be. It shows that X1's GPU's performance at 1.5W is comparable to an iPad Air 2's(A8X) GPU which runs at 2.5W. It's unbelievable for a device that regurlarly hover at ~15W at load to only have a 1.5W GPU which takes up a significant portion of the SoCs size. The A57's are power hungry (which explains switch's heavy downclock) but not that hungry. The X1 GPU regulary perform over 2x that os the A8X in graphics benchmark to, assuming power effeciency linear (it isn't), that is 3W, but since it is nonlinear, lets just say 4W. Even then, I think that's being conservative, I wouldn't be suprise if it was >5W at full clockspeed.

 

Even at 5 watts, that's 100 GFLOPS/watt, if Nvidia was actually achieving that, everyone would be using Nvidia. 

You could have a 1.4 teraflop machine for just 14 watts, the XBox One die shrunk to 14nm/16nm (even smaller than the Tegra X1's 20nm) still consumes over 60 watts ... there's no way Nvidia has such magic up their sleeves, especially with a chip that is about two years old.