Intel Socket LGA 775 Supports Intel Core 2 Duo/Pentium D/Pentium 4/Celeron D Processor Supports FSB 1066/800/533MHz CHIPSET VIA P4M900 + VT8237A MEMORY Support to Single Channel DDR2 Support DDR2 400/533/667 Mhz Maximum memory capacity is 4GB EXPANSION SLOT 2 x PCI Slot 1 x PCI-Express x 1 Slot 1 x PCI-Express x 16 Slot