Dell Studio XPS 8100 G3HR7 Desktop (DT) Motherboard Systemboard Mainboard Chipset: Intel H57, Supported Processors: Intel Core i7-870, Intel Core i7-860, Intel Core i7-750, Intel Core i5-670, Intel Core i5-661, Intel Core i5-660, Intel Core i5-650, Intel Core i3-540, Intel Core i3-530 Supported Memory: Connectors four internally-accessible DDR3 DIMM sockets Capacities 1 GB, 2 GB, and 4 GB Memory type 1066-MHz or 1333-MHz DDR3 DIMM; non-ECC memory only Memory configurations possible 4 GB, 6 GB, 8 GB, 12 GB, and 16 GB (64-bit operating system), Audio: Integrated 7.1 channel, High Definition audio with S/PDIF support Video: Intel Graphics Media Accelerator HD, Expansion Capabilities: PCI one 124-pin conncetor, PCI Express x1 two 36-pin connectors, PCI Express x16 one 164-pin connector Peripheral Interfaces: Network adapter RJ45 connector USB two top-panel, two front-panel, and four back-panel USB 2.0-compliant connectors Audio top panel - one headphone and one microphone connector, back panel  six connectors for 7.1support S/PDIF one S/PDIF (optical) connector eSATA one back-panel connector IEEE 1394a one back-panel 6-pin serial connector HDMI 19-pin connector DVI 24-pin connector Motherboard Compatible Part Number: G3HR7