PLX PEX8747 Switch Controller has a PCIe 3.0 x16 upstream port as well as four PCIe 3.0 x4 downstream ports. Dedicated PCIe 3.0 x16 bus bandwidth fully maximizes AHCI/NVMe SSDs performance, And dedicated PCIe 3.0 x4 bandwidth for each NVMe M.2 SSD This card does not rely on PCIe bifurcation supported by CPU or PCH AHCI/NVMe RAID is supported base on the motherboard chipsets & macOS Disk Utility Independent, Stand Alone NVMe SSD Solution Supports Windows 10 & Later, Windows 2016 Server, & Linux Kernel 3.3 & later