1. Compliant with Serial Specification 3.0, down compatible with SATA2.0 SATA1.0. 2. Conformance to PCI-Express v2.0 specifications, down compatible with PCI-Express v1.0. 3. Supports communication speeds of 6.0Gbps,3.0Gbps and 1.5Gbps. 4. Supports Gen 1i,Gen 2i,Gen 2m, Gen 2x and Gen 3i. 5. Supports two SATA Ports. 6. Supports AHCI 1.0 and IDE modes. 7. Supports Native Queuing(NCQ) 8. Supports Port Multiplier based switching or based switching. 9. Supports Hot Plug and Hot Swap. 10. Compatible with SATA 6G,3G and 1.5G Hard Drives Specification: Product interface: PCI-E 1X 4X 8X 16X Chipest: JMS582B Support specification: SATA3.0 7PIN Bus interface: PCI-Express X1 slot Extension interface: 2 SATA3.0 interfaces System requirements: there is an available PCI Express X1 slot, while supporting PCI-E X2 X4 X8 X16 : Windows10/8/7 (32/64 bit) / Vista (32/64 bit) / XP/2003/2008/linux Colour:black Material:Metal Package Contents: 2 * riser card 2 * half-height bezel Only the above package content, other products are not included. Note: Light reflection 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.