SocketIntel LGA775Supported Processors Intel Intel Pentium 4 (single core)Intel Pentium D (dual core) Intel Pentium processor Extreme Edition (dual core) Intel Pentium 4 Extreme Edition (with Hyper-Threading) Memory4 DDR2 full Buffered DIMMs Slots 4 GB MAX Memory External Connectors 1 x RJ-45 Gigabit Ethernet Connector 1 x Parallel Connector 1 x Serial Connector 3 x Audio Ports5 x USB 2.0 Connectors 2 x PS2 Connectors