LSI 3ware SAS 9750-4i. Supported hard disk drive interfaces: SAS, Host interface: PCI Express x8, PCI Card form factor: half-height (low-profile). Internal memory: 512 MB, Internal memory type: DDR2, Memory clock speed: 800 MHz. Data transfer rate: 6 Gbit/s. Processor family: PowerPC, Processor clock speed: 800 MHz. Voltage: 12/3.3 V, Power consumption (typical): 22.7 W