Processor, operating system and memory Processor Quad-Core Intel® Xeon ® Processor E5640 2.66Ghz/ 4.8GT/ 4M L3/ 800Mhz, 1/2 Number of processors 1 Processor upgrade 1 Standard memory 1 x 4GB PC10600 ECC Memory DDRIII-1333Mhz Memory slots 8 Internal drives Internal drives IBM 146GB 2.5in SFF HS 10K 6Gbps SAS/8TB Storage controller RAID M5014 (256MB Cache) 0, 1, 10, 5, 50 Internal drive bays -- Optical drives -- System features Form factor Rack (2U) Chipset -- Network interface Integrated 2 ports, plus 2 ports optional Gigabit Ethernet External I/O ports -- Expansion slots 4xPCI E x8 (convertable to 2x PCI x16) Power supply type 675W Hot-Swap 1/2 Compatible operating systems Microsoft® Windows Server 2003 and 2008, Red Hat Enterprise Linux®, SUSE Linux Enterprise Server and VMware ESXi 3.5 embedded hypervisor Product weight --