fpgaZTEX
ZTEX USB-FPGA 1.15y
Quad-FPGA USB cluster board
Hashrate
860 MH/s
Power
39W
Efficiency
45 J/MH
MSRP
$1,060
The ZTEX 1.15y crammed four Spartan-6 LX150 FPGAs onto a USB-powered board, hashing at ~860 MH/s total. Miners stacked them on USB hubs to build low-cost clusters — a glimpse of industrial-scale mining before ASICs arrived.