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This M.2 M Key to 4-Port PCIe X16 expansion hub is specially designed for mining rig construction. It takes power and signal from M.2 M Key or PCI-E X1 slot, expanding one channel into four independent PCI-E X16 ports to connect multiple graphics cards simultaneously. Support 6Pin power, SATA power and USB power multiple power supply modes, effectively solve insufficient power supply and ensure stable continuous operation. Premium PCB circuit and anti-interference design maintain steady signal output, avoiding crash or offline during long-term mining work. Plug and play with strong compatibility, perfectly suitable for BTC, ETH and other cryptocurrency mining equipment assembly, greatly improving the utilization rate of motherboard slots and reducing the cost of mining rig configuration.