MSI 790FX-GD70 Socket AM3--140 Watt CPU--AMD 790FX CrossFire--4DDR3-2133(OC)--ATI Quad/Triple CrossFireX--ATX Motherboard AMD 790FX and SB750 Chipset. Socket AM3. CPU Support: Sempron, Athlon II, Phenom II. Single, Dual, Triple, Quad, and Hex core. DDR3 Memory, 4 Slots, 16GB max, speeds: 800/1066/1333/1600*/1800*/2133* MHz. HyperTransport 3.0 supporting speed up to 5200MT/s. CrossfireX (16x+16x or Quad 8x). SATA II, RAID:0/1/5/10/JBOD.Lossless 24 bit/192KHz HD Audio, 8-channel with jack sensing, True Blu-ray Audio Support. Dual Gb LAN controller, Supports 10Mb/s, 100Mb/s and 1000Mb/s. Slots:4 PCI Express x16 slots, 1 PCI Express gen2 x1 slot, 2 PCI slots.I/O connectors: 8 x Serial ATA II, 1 x ATA133 HD, 1 x IEEE1394, 1 x Floppy disk, 7 x USB 2.0, 1 x eSATA, 1 x coaxial SPDIF, 1 x optical SPDIF. Dr. MOS, OverClock dial; onboard power, reset and clear CMOS buttons. All solid capacitors, Active phase switching, shielded chokes. 30.4cm(L) x 24.5cm(W) ATX Form Factor