If E3 is GPU based system, it will not be so cheap. The RX 470 cost more than $300 each, 6 will cost more than $1800.
theres literally no proof any ETH ASIC even exists.
Bitmain is not going to put consumer grade GPUs in a box and sell that as E3?
As pointed out by other even if it's GPU based design, it should be using a custom PCB and manufactured much cheaper. Not to mention even RX470/RX570 was $179 or $189 MSRP before mining boomed. In fact there were 4gb cards available easily for $200 odd even on Black Friday.