Quad U.2 SSD to PCIe 4.0 X16 Adapter: By installing 4 U.2 SSDs on this PCIe 4.0 X16 adapter, your computer will be able to access 4 U.2 SSDs at the same time Hardware Platform: Support Soft RAID in Intel/AMD platform, not support Mac Pro 5.1 (Note: To set up Intel's RAID-on-CPU (VROC), you need to purchase your license) Set the PCIe Bifurcation mode of the corresponding PCIe slot in the BIOS, support X4X4X4X4 or Hyper M.2 X16 mode (Note: X8X4X4 or X4X4X8 mode can only recognize 3 U.2 SSDs.) Important: Because this adapter does not support PCIe Bifurcation, it requires a motherboard that supports PCIe Bifurcation. Otherwise, only the NVMe-1 port can recognize the NVMe SSD. Before purchasing, please check the PCIe expansion slot part of the motherboard manual on the motherboard manufacturer's website, or consult us directly. To reach PCIe 4.0 X4 (64Gbps) full speed, the CPU and motherboard PCIe slot and PCIe M.2 SSD should all be PCIe 4.0 features (Note: PCIe 4.0 is not supported on Inte