Tyan AMD Opteron 6100 SATA PCI-Express DDR3 USB 2.0 SSI Meb Server Motherboard S8232GM4NR Supported CPU Series:AMD 45nm 8-Core/12-Core Opteron 6100 Series Processors (Magny-Cours) /HT3.0 support ; 12MB L3 per socket Chipset:AMD (2)SR5690 + SP5100 Capacity: Up to 256GB RDIMM/64GB UDIMM Memory channel: 4 Channels per CPU Memory voltage:1.5V or 1.35V Supported CPU Series:AMD 45nm 8-Core/12-Core Opteron 6100 Series Processors (Magny-Cours) / HT3.0 support ; 12MB L3 per socket Chipset:AMD (2)SR5690 + SP5100 Capacity: Up to 256GB RDIMM/ 64GB UDIMM Memory channel: 4 Channels per CPU Memory voltage:1.5V or 1.35V Graphics Controller ManufacturerASPEED Graphics Controller ModelAST2050 Number of PCI Express x4 Slots2