DELL OPTIPLEX 990 SFF SYSTEMS LGA1155 GENUINE MOTHERBOARD D6H9T CN-0D6H9T OEM US manufacture:Dell Dell part number:D6H9T Chipset: Intel Q67 Express Chipset External Connectors 1 x RJ-45 Gigabit Ethernet Connector 1 x VGA Connector 1 x Serial Connector 6 x USB 2.0 Connectors 2 x Audio Ports 2 x PS2 Connectors 1 x Display Port Compatible Models: Dell OptiPlex 990 SFF Series