This adapter card has 4 expansion cards, which can simultaneously expand 4 x 32Gbps fullspeed. ^^ Adopts a firm structure and uses thicker PCB material to stabilize the PCIE X16 interface and important data. ^^ The motherboard supports PCIE split or PCIE RAID function, and supports PCIE 3.0, 4.0 protocol. ^^ No disk drop, no speed reduction, no blocking, and equipped with highpower DC power chip to ensure stable of M2. NVME SSD. ^^ 4 disks are equipped with 4 LED indicators, and the is simple and convenient to use.