Comply with Serial ATA 3.0 specification, backward compatible with SATA2.0 SATA1.0     Comply with PCI-Express v2.0 specification and backward compatible with PCI-Express v1.0.     Support 6.0 Gbps, 3.0 Gbps and 1.5 Gbps of communication speed     Supports Gen 1i, Gen 1x, Gen 2i, Gen 2m, Gen 2x, and Gen 3i.     Support 4 SATA          Support AHCI1.0 mode and IDE mode     Support native command queue (NCQ)     Support FIS based on port multiplier switch or command switch.     Support hot swap and hot swap.     Compatible with SATA6G, 3G and 1.5G hard drives     Bus interface: PCI-Express x1 slot     Expansion interface: 6 SATA3.0 interfaces     System requirements: There is an available PCI Express X1 slot, while supporting PCI-E X2 X4 X8 X16     Operating system: Windows10/8/7 (32/64 bit)/ Vista (32/64 bit)/ XP/2003/2008/linux     Synology can only recognize 4 disks, please know      Colour: black     Material: PC + metal     Size: 16x13x5CM          Package Contents:     1 * SATA3.0 expansion card          Only the above package content, other products are not included.     Note: Light shooting 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.