Smart Array Card 12Gbps PCI Express 3.0 X8 Mini SAS HD SFF8643 Two X4 RAID Controller Card for Computer Transmission Item Type: Smart Array Card Material: Printed Circuit Board Model: Mega RAID SAS 9311 8i Connector: Mini SAS HD SFF8643Two(x4) Internal Connector I/O Controller: LSI SAS3008 RAID Level: 0.1.1E,10 SAS Bandwidth: Half Duplex (X8 Wide Bus)9600MB/s Connector Type: Mini SAS HD SFF8643 Port Configuration: 8 Internal 3.0SATA/SAS Ports Number of Ports: 8 Ports, Internal Bus Interface: PCI Express 3.0x8 Data Transfer Rate: 12Gb/s PCI Data Burst Transmission Rate: Half Duplex X8, PCIe3.0, 8000MB/s Rated Power: 13W Number of Devices: A Maximum of 256 Devices Are Supported By Expander MTBF: Greater Than 2,800.000 Hours Operating System Support: Suitable for Win, for Linux, for Solaris, for VMware, for FreeBSD. Backwards Compatible with Previous SAS and PCle Generations Through Automatic Negotiation, And Provide SAS Data Transfer Rates