Sparepart: Dell Motherboard SFF, D28YY Genuine Dell D28YY Motherboard For Optiplex 790 SFF Systems Chipset: Intel Q65 Express/ Supported Processors: Supports: Intel Core i7 2600, Intel Core i5 2500, Intel Core i5 2400, Intel Core i3 2120, Intel Core i3 2100, Intel Core i3 2130, Socket LGA1155 Supported Memory: 16 GB Max, DDR3 (4 Slots), 1 x DIMM1, 1 x DIMM2, 1 x DIMM3, 1 x DIMM4 Audio: Integrated Audio/Microphone/ Disk Drive Interface: SATA X 2/ Expansion: 1 x PCI-e 4x connector(SLOT2), 1 x PCI-e 16x connector(SLOT1) Peripheral Interfaces: 1 x Display Port Connector, 1 x Serial Port, 1 x Mouse Connector, 1 x Keyboard Connector, Onboard Sound , Onboard VGA, 6 x USB Ports, 1 x Network LAN 10/100 Port Compatible Part Numbers: D28YY