Expand 1 PCI-E x1 slot into 2 independent PCI-E channels for more mining GPUs; Dual USB 3.0 signal ports for external riser cable connection, flexible rig layout; Built-in large aluminum heatsink for effective heat dissipation & stable long-hour mining; Direct PCI-E bus power supply, no extra auxiliary power cable required; Wide compatibility with PCIe x1/x4/x8/x16 slots, Windows & Linux mining systems