Word on the street is that they will have a 50-percent improvement in performance per watt, which seems a bit high. These are the beasties you will find in the RX 480 and RX 460 which were already praised for their high performance with low power draw.

It could mean that an embedded Polaris 11 card which had a 75w draw will go to 50w and get a 0.35 Tflop increase in raw performance.

This should bring about a range of mid-generation GPUs with refreshed internals that make them far more capable. Polaris 10 found in the RX 480 will get 5.8 Teraflops performance need less than 95 watts.

They should be out under RX 4XX branding in a few months but it will mean that the mid-range laptops that have them will have much longer battery life.

While the specs are pretty good, Vega will clean their clock so it is probably better to wait.