BIOSTAR TPower X58 - Intel x58 chipset (Core i7 Extreme/Core i7) QPI 6400MT/s - Triple-channel DDRam III 1866(OC)/1600(OC)/1333/1066 MHz (6 DIMM support max 24GB); Sound 8 Channel HD, Dual NIC 10/100/1000 Mbps; 03 PCI Express x16, 01 PCI Express x1; 6 SATA & 2 eSATA; 1 IDE; 9 USB 2.0; 1 IEEE 1394a; CrossFire X, SLI, RAID, Biostar G.P.U (Green Power Utility) Technology for Energy Saving, 12-Phase CPU Power, 2-Phase RAM Power, RapidDebug3, M.I.T, Biostar Exlusive Tpower Utility & Space-pipe Thermal Solution, 100% Japanese Solid Capacitors Design