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This 4 Ports USB 3.0 PCIe expansion card is a cost-effective expansion solution for mining machines. It expands a single PCIe 1X interface into four USB 3.0 ports to connect multiple PCIe risers and graphics cards. Stable circuit design effectively reduces signal interference and guarantees steady operation under high load. Lightweight and easy to mount, it is widely compatible with most motherboards. Ideal for BTC crypto mining rig assembly, industrial equipment expansion and multi-peripheral connection.