Dell Optiplex Socket 745 Mini Tower Main System Motherboard (KW626) CHIPSET: Intel Q965 Express, SUPPORTED PROCESSORS: Intel Pentium 4, Pentium D, Celeron, Core, Socket 775 SUPPORTED MEMORY: 4 DIMM slots supporting up to 8 GB RAM, VIDEO: Integrated onboard video AUDIO: Integrated Audio Sound Controller, ADI 1983 High Definition Audio EXPANSION CAPABILITY: 1 PCI-E X16 slot, supports x16, x8, x4, and x1 modes/cards Motherboard Part Numbers: TY565, HR330, KW626