Intel BOXD915PGNX Intel 915P Express Socket775 ATX Motherboard with Sound Intel 915P chipset / Socket 775 / 533/800 MHz / ATX form factor / Supports up to 4 GB DDR SDRAM (DDR 333/400 MHz) / LPC Bus I/O controller One (1) UDMA/33/66/100 IDE controllers / One (1) floppy controller / Four (4) Serial ATA interfaces / Intel high-definition audio Expansion Slots: One (1) 16 X PCIe slot / 2 (2) 1 X PCI Express slots / Four (4) PCI slots / Four (4) 184-pin DIMM slots Pentium 4 2.80GHz to 3.80GHz Hyper-Threading 800MHz FSB / Pentium 4 (Extreme Edition) 3.40GHz Hyper-Threading 800MHz FSB I/O Ports: Two (2) PS/2 ports / One (1) 9-pin standard serial port / One (1) 25-pin standard parallel port