Bus speed PCI: 133 MB/sPCI Express:l x1-slot bidirectional speed — 500 MB/sl x16-slot bidirectional speed — 8 GB/sSATA: 1.5 Gb/s and 3.0 Gb/sUSB: 480 Mb/sCardsPCI two full height cardsPCI Express x1 one full height cardPCI Express x16 one full height cardDrivesExternally accessible:5.25-inch drive bays two bays for SATA DVD-ROM / DVD+/–RW / CDRW /Blu-Ray Disc™ drive3.5-inch drive bay 19-in-1 Media Card readerInternally accessible:3.5-inch drive bays two bays for hard drivesExternal ConnectorsAudio:back panel three connectors for line-in, line-out, and microphonefront panel two connectors for microphone and headphoneNetwork adapter one RJ45 connectorSerial one 9-pin connector; 16550C compatibleUSB:front panel fourback panel sixVideo 15-pin VGA connector28-pin DVI-I connector20-pin DisplayPort™ connector19-pin HDMI connectorNOTE: Available video connectors may vary based onthe graphics card selected.Systemboard ConnectorsPCI 2.3:connectors two 120-pin connectorsdata width (maximum) 32 bitsPCI Express x1:connectors one 36-pin connectordata width (maximum) one PCI Express lanePCI Express x16:connectors one 164-pin connectordata width (maximum) 16 PCI Express lanesSerial ATA four 7-pin connectorsMemory four 240-pin connectorsInternal USB device one 10-pin connector (supports two USB ports)Processor fan one 4-pin connectorSystem fan one 3-pin connectorFront panel control one 9-pin connectorFront panel audio one 10-pin connectorSPDIF audio one 6-pin connectorProcessor one LGA1156 connectorPower 12V one 4-pin connectorPower one 24-pin connectorControls and Lights