You know (and granted I'm no expert) I've always wondered why don't fpga mining board designers just find the cheapest FPGA chip and slap a whole bunch of them on a PCB and cluster them. For example put 8 Cyclone IV chips on one board and get 600 Mh/s

But the problem may be getting them cheap enough without the need to buy them in massive bulk quantities...to quote a website: "The EP4CE6 and EP4CGX15: Starts at $3 and $6 for 250K pieces"

Anyone got $750,000 lying around?