Features: Differential line-pair traces are used to support PCI-E 3.0 4X signals. It connects to M.2 NGFF to PCI-E X4. M.2 nvme ssd to pcie adapter card support pcie x4 / x8 / x16 slot. The transfer speed will up to 64 Gbps with the channel of PCIe 4.0 X4 and get a full speed with the PCIe 3.0 X4, improve your computer performance. Compatible with PCIE 3.0 motherboards and backward compatible with PCIe 2.0 and PCIe 1.0. Package include: 1*M.2 NGFF M-Key to PCIe X4 Adapter Card, 1*Low-Profile Bracket. ​Specifications: Material: PCB+Metal Fit for Adapter Card 2230 2242 2260 2280 Support system: for WIN8, for WIN10, for LINUX, for MAC Package include: 1*M.2 NGFF M-Key to PCIe X4 Adapter Card 1*Low-Profile Bracket