Requires the motherboard PCIe x16 slot to support splitting to x4 + x4 + x4 + x4. If the PCIe x16 slot only supports splitting to x8 + x4 + x4, only three disks can be recognized. If the PCIe x16 slot only supports splitting to x8 + x8, only two disks will be recognized. Mount four U.2 NVMe SSD into computer. (If using 4 hard disks at the same time, because the PCIe slot large support 75 watts of power consumption, you need to connect an auxiliary power supply, the right side of the adapter card has an auxiliary power supply connector (power cord included), connect the chassis power supply can be.) Be used as a system disk, by comfig motherboard BIOS support to boot from PCIe. Only Support 2.5" U.2 NVMe SSD. Does NOT support hot swapping. Full profile bracket included. Back weighing bracket design, more sturdy and better heat dissipation.