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Just as is the case of GP104, because the GPU core has so high clocks, it can be downclocked to fit much smaller thermal envelopes.

Similar thing would be possible with even GP100, and downclocking the GPU to 125W TDP.
 
i thought 125W is for the imac...i wonder if the mac pro does not support bigger W?
 
Certainly a lot of features that would work for Apple - mGPU, the HBC and HBC Controller, coherency between two GPU, working with a fabric if they went AMD CPU.
Think back to the current Mac Pro - custom designed GPU board, custom connector (PCIe but a custom socket on the daughterboard).
Vega seems, on quick preview to be a first stab at consumer and up OpenCAPI.

Seeing as they haven't even shown the SKUs for Ryzen, they're holding more back for Zen. But what they show they mean business.
 
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