The new Bitmain Ethash miner on the horizon (shipping in August) matches GPUs in hashrate/watt, so that indicates also it is probably merely some GPUs with lots of memory in a box. But the thing is, it costs $800 for the equivalent of 5x 1080 Ti or 5x Vega 64.
It would be more fair to compare it to 6 x 1070 or 6 x RX 570/580, since ETH miners don't USE Vega or 1080 ti cards due to their VERY POOR HASHRATE PER $.
Sure both cards will do ballpark 35 Mhash, but when a 1070 at less than 70% of the cost manages 31+ and a RX 570/580 at HALF OR LESS the cost manages 28-30.....