Genuine Dell XPS 420 Motherboard TP406, Supports The Following Processors: Intel Core 2 Q6600 Quad Core, Intel Core 2 Duo Processor E8400, Intel Core 2 Q8200 Quad-Core, Intel Core 2 Q9400 Quad-Core Chipset: Intel X38 Express Chipset/ ICH9R, Supported Processor: Intel Core 2 Q6600 Quad Core, Intel Core 2 Duo Processor E8400, Intel Core 2 Q8200 Quad-Core, Intel Core 2 Q9400 Quad-Core Supported Memory: 4x dual-channel 667 and 800-MHz DDR2, 8gb Max Total (64-Bit Operating System), 4gb Max Total (32-Bit Operating System) Audio: Integrated HDA 7.1 Channel, Video: NO INTEGRATED VIDEO Expansion Capabilities: 3x PCI Connectos, 1x PCI-E x1 Connector, 1x PCI-E x16 Connector 1x eSATA Port, 1x RJ45 Ethernet/LAN Port, 2x front-panel and 6x back-panel USB 2.0-Compliant connectors