Sorry, this may be slightly more tangential for this thread....
The RX 500 series will be out later this half, most likely May or June. The information I read is that the efficiency is supposed to be quite good. I'm curious to see the price and throughput of these "next gen" cards. This next card release gives me pause on buying a Panda based off of RX400s. I understand that HBM2-based Vega cards will be prolly 250/300W cards.