Dell Studio XPS 8000 Series Intel Socket LGA1156 Desktop Motherboard X231R 0X231R CN-0X231R.Dell Part Number: X231R 0X231R CN-0X231RModel Number: DP55M01Compatible Part Numbers: YD0213 01012JGA0-018-GCompatible Models: Dell Studio XPS 8000 Series Specifications:Chipset: Intel P55Socket: LGA1156Expansion Slots: 1 PCI, 1 PCI Express x16, 2 PCI Express x1Other Features: Hyper-Threading Technology SupportRear Ports:IEEE 1394aRJ45 10/100/1000 Network portLine-in connectorFront L/R line-out connectorBack L/R surround connectorSide L/R surround connectorCenter/subwoofer connectorMicrophone connectorUSB 2.0 (4)eSATAS/PDIF connectorAudio: Integrated 7.1 channel High Definition AudioSupported Memory: DDR3 SDRAMMaximum Memory: Up to 16GB Dual-Channel 1333MHz DDR3 SDRAM - 4 DIMMs