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This 300mm M.2 Key M to PCIe 4.0 X16 riser cable comes with a SATA power cable for steady power connection. It supports full PCIe 4.0 bandwidth, delivering high-speed and reliable data transmission. Designed exclusively for M.2 Key M interface, it is incompatible with M.2 SATA slot. The flexible 300mm cable helps optimize internal chassis layout and space utilization. Premium shielding design effectively prevents signal loss and electromagnetic interference, ideal for ITX motherboards, small cases, GPU and storage device expansion.