Features: brand new and high quality for PCIe x8/x16 slot, this riser card can be transferred out of 2xu2 interface (SFF-8643) through the host PCIe x8 slot. Users can transfer SFF-8643 to u2 data cable (SFF-8639) and connect 2x u.2 SSD bus broadband at the same for time. Installation is simple and no driver is required. Committed to solving the increasing storage needs of users. Support System: Windows2000 / xp / server2003 / xp 64bit / Vista / win7 linux/ DOS Specifications: Product Model: PCIE to u.2 Adapter Card Interface Type: PCIE Applicable Models: Conventional Desktop Computers Expansion Interface: SFF-8643 Size: Mixed Note: The motherboard needs to support the split function, and does not support the use of a single interface. For personal computers have one or more standard PCIE slots. Package includes: 1 x PCIE to u.2 Adapter Card