Upgrade version Dual U.2 SSD to PCIe 4.0 X8 Adapter, Support 2 x U.2 SSD or Soft Raid, without PCI-e Splitter Function (PCIe Bifurcation Motherboard is Required). Dual U.2 to PCIe 4.0 X8 Adapter: By installing 2 x U.2 SSDs on this PCIe 4.0 X8 adapter, your computer will be able to access 2 x U.2 SSDs at the same time. Hardware Platform: Support Soft RAID in for Intel/for 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 X4X4X8 or Hyper M.2 X16 mode (Note:Can not support X8X4X4 mode) 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 Intel CPUs below 11th generation) Name:Dual U.2 to PCIe 4.0 X8 Adapter OS compatibility:Plug-and-play in Windows 11/10/8/Linux/Mac OS (Note: Not support Windows 7). The U.2 SSD needs to be initialized and formatted before it can be recognized by the computer host. Important:Because this adapter does not support PCIe Bifurcation, it requires a motherboard that supports PCIe Bifurcation. Otherwise, only the Port-1 port can recognize the U.2 SSD. Colour:Black Material:PCB Package Contents: 1 * Adapter Card 1 * Long Metal Bracket 1 * Screw Kit