asic bitcoin Box Miner 38 GH/S Fast Shipping ~30 Gh/s guaranteed speed, with overclocking and proper cooling & power they can reach speeds of 38Gh/s. Stackable, Ethernet, 6Pin PCIe Power, Cooling Fans built in with temperature and power cutoff in case it overheats. Consist of Five mini ASICMINER blades. Stackable and scalable Design!