PCle 3.0 X16 four-channel expansion card, internal output 4-channel SFF8654-8i. The main control PLX8749 chip provides high-bandwidth and low-latency transmission capabilities to meet high-speed data interaction and high-performance computing. The built-in DMA engine ensures the reliability and stability of data transmission. It supports up to 8 devices for expansion and can be configured with multiple bus modes of x16/x8/x4. Multiple mode switching to meet different needs: X16+X16, X8X8+X8X8, X4X4X4X4+X4X4X4X4. It can connect graphics cards, M.2 hard drives, and U.2 hard drives. Color:Black Material:PCB+Metal Package Contents: 1 * PCIe Expansion Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.