1:M.2 NVME to PCI-E 3.0 X4 Expansion Card 2:Type: PCIE to M2 Adapter 3:Internal Interface: M Key + B Key Dual Ports 4:Support Slots: PCI-E 3.0 X4 GEN3 (Compatible with X4 X8 X16 slot): 5:Support devices: PCI-E specification m.2 NVMe and SATA specification M.2 NGFF disk 6:Support system: Windows XP/Vista/7/8/10, Linux, Mac OS.