Adaptec Serial ATA II RAID 2420SA 10pck. Host interface: PCI-X. Data transfer rate: 3000 Mbit/s. Operating temperature range (T-T): 0 - 55 °C. Minimum system requirements: PCI Intel / AMD 64-bit 3.3v PCI-X /, Dimensions (WxDxH): 78.7 x 167.6 mm