Dell Optiplex SMT Small Mini Tower Motherboard GM819 CHIPSET:Intel Q35 Express w/ ICH9D0 Supported Processor: Intel Pentium, Celeron, Core 2 Duo, Core 2 Quad, Socket 775 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, 4 - 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-E x1 slot, 2 PCI 32Bit / 33MHz slots, 1 FDD connector,Compatible Part Numbers: GM819, JR271, Y255C