Four Intel? Xeon MP Processors at 3.00GHz/4MB, up to 8 supported (populated in groups of 4) with 400MHz FSB and the HP developed F8 Chipset4MB integrated Level 3 cache (per processor) - 4P Processor Bricks option kits availableTwo 1150/500 Watt Hot Plug Redundant Power Supplies StandardFour 1" Hot Plug SCSI Hard Drive bays availableEleven total Hot Plug slots (10 - 64bit/100MHz PCI-X, 1 - 64bit/33MHz)7U rack-optimized modular chassisMost complete investment protection solution in the industry through a modular-upgrade strategyOne (1) NC7770 PCI-X Gigabit NIC (integrated)