Dual Intel® 64-bit Xeon® Support up to 60 GHz Up to 16GB DDR2-400 SDRAM 2 (x8) & 1 (x4) PCI-Express, 1 x 64-bit 133MHz PCI-X, 2 x 64-bit 100MHz PCI-X Intel® 82546GB Dual-port Gigabit Ethernet Controller Zero Channel RAID Support 8 x 5" hot-swap Ultra320 SCSI Drive Bays 650W Redundant-Cooling Power Supply Tower or Rackmount 100% Cooling Redundancy