Dual NVMe PCIe Adapter allows you add 2x M.2 NVMe SSD to Mainboard via a single PCI-e x4 Slot. Dual NVMe to PCIe Adapter Adopts ASMedia ASM2812 Chipset, It does NOT on PCIe bifurcation supported by . Compatible with M.2 SSDs (PCI-e NVMe ): All Size 110x 22mm, 80x22mm, 60x22mm and 42x22mm. Hardware Requirement: Available PCI-e 4x/8x/16x Slot on Mainboard, Compatible with PCI-e 3.0/2.0/1.0 standards. M.2 NVMe Adpater lets you to use SSDs individually, to or in a storage pool for OS or 3rd party software RAID configuration. Does NOT support Hardware RAID. Hardware Requirement: PCI-e 3.1 x4/x8/16x Slot, backward compatible with PCI-e 3.0/2.0/1.0 Wide Compatiblility: compatible with all M.2 NVMe SSD (22110, 2280, 2260, 2242, 2230), NOT for SATA Based B+M Key SSD Chipset: ASMedia ASM2812, Supports Non-bifurcation motherboard Colour: black Material: PCB+metal Size: 120 x 180mm Package Contents: 1 x riser card 1 x 2U baffle NOTE: 1. This M.2 PCIe Adapter can Only Support M.2 PCI-e Based M Key Nvme SSD, DO NOT support PCI-e M Key AHCI SSD, SATA based B+M key or B Key SSD. 2. download driver of SSD from the brand website if "Disk Management" or "Device Management" can not show the SSD. 3. Old MB can not support Booting from "NVMe", confirm the MB's specification 4. Each SSD costs PCI-e 3.1 x4 Channel, NOT whole PCI-e 3.1 x8 Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.