Processor: 2 x Socket 1366, Xeon W5500 Series, X5500 Series,E5500 Series ,L5500 Series, QPI 4.8/ 5.86/ 6.4 GT/s - Core Logic Intel® 5520 chipset IOH, Intel® ICH10R I/O Controller, NEC PCI-X Bridge - Form Factor SSI EEB 3.61, 12" x 13" - Memory Total Slots: 12 (3-channel per CPU, 6-DIMM per CPU) - Memory Type: DDR3 800/1066/1333 Reg DIMM/ Unbuffered DIMM with ECC - Capacity: Maximum up to 96GB (RDIMM), Maximum up to 48GB (UDIMM) - Networking LAN: 2 * Intel® 82574L + 1 * Mgmt LAN ------ DETAIL SPEC----- http://www.asus.com/product.aspx?P_ID=gGozRAk0YWQCQtSA