Dell Optiplex 755 SFF Core 2 Duo System Board W/O CPU CHIPSET: Intel Q35 Express w/ ICH9D0, SUPPORTED PROCESSOR: Intel Pentium, Celeron, Core 2 Duo, Core 2 Quad, Socket 775 SUPPORTED MEMORY: 4 DIMM slots supporting up to: 8 GB of RAM for 64-bit OS, or 4 GB of RAM for 32-bit OS, VIDEO: Integrated Graphics Media Accelerator 3000 AUDIO: Integrated Audio Sound Controller, ADI 1984 High Definition Audio, PERIPHERAL INTERFACES: (8) 2.0 USB (front and back), (1) parallel printer port, (1) serial ports, 2 - Serial ATA (SATA) Interface Ports, 1 - e-Serial ATA (eSATA) Interface Port, 1 -10/100/1000 Ethernet Port EXPANSION CAPABILITY: 1 PCI-E X16 slot, supports x16, x8, x4, and x1 modes/cards, 1 PCI 32Bit / 33MHz slots MOTHERBOARD PART NUMBER: PU052