HP 462830-B21. Supported hard disk drive interfaces: SAS, Host interface: PCI Express x8, PCI Card form factor: Half-height (low-profile). RAID levels: 0, 1, 10, Internal memory: 256 MB, Data transfer rate: 0.3 Gbit/s. Width: 19.05 cm, Depth: 24.13 cm, Height: 5.715 cm