Features: 1. Optimal Solution: Connect two 2.5-inch U.2 (SFF-8639) PCIe NVMe SSD drives to PCIe x8 slots in your system via SFF-8643 cables (not included). Installs two PCIe NVMe U.2 2.5-inch SSDs into your PC system via a PCIe 3.0 x8 card. 2. Specifications: Two SFF-8643 mini SAS HD connectors (requires motherboard to support sharing function; single interface not supported). Interface: PCIe x8 to dual-port SFF-8643. Hardware Requirements: PCIe 3.0 x4/x8/x16, backward compatible with PCIe 2.0/1.0. 3. Throughput: Employs advanced manufacturing techniques to support a maximum throughput of 32 Gbps in PCIe 3.0. 4. System Support: Supports Windows 2000, XP, Server 2003, XP 64-bit, Vista, Win7, Linux, DOS, and OS X. 5. Easy Installation: The adapter card transmits two SFF-8643 interfaces via the host computer's PCIe x8 slot. Users can connect two U.2 SSDs simultaneously via SFF-8643 to U.2 (SFF-8639) data cables (not included), using a single bus bandwidth. Easy to install; no drivers required. Specifications: Item Type: PCIe x8 to U.2 Adapter Card Material: PCB Interface Type: PCIe x8 Applicable Models: Standard Desktop Computer Expansion Interface: Dual-port Mini-SAS HD (SFF-8643, 36-Pin) Female Supported Systems: Windows 2000, XP, Server 2003, XP 64-bit, Vista, Win7, Linux, DOS, OS X Hardware Requirements: PCIe 3.0 x8/x16, backward compatible with PCIe 2.0/1.0 Package List: 1 x PCIe x8 to U.2 Adapter Card 1 x Low-Profile Bracket