ASUS Crosshair IV Extreme

CPU Socket	AMD Socket AM3
Supported CPU	Phenom™II /Athlon™II /Sempron™ 100 Series Processors
Northbridge Chipset	AMD 890FX
Southbridge Chipset	SB850
Front Side Bus	Up to 5200 MT/s ; HyperTransport™ 3.0
DIMM Sockets	4 x DIMM
Supported Memory	DDR3 2133(O.C.)/2000(O.C.)/1600/1333/1066 ECC,Non-ECC,Un-buffered Memory
Max. Memory	16 GB
Expansion Slots	5 x PCIe 2.0 x16 (dual @ x16, triple @x16, quad@x16 x16 x8 x8) 1 x PCI 2.2
Serial ATA Controller	6 xSATA 6.0 Gb/s ports 2 x SATA 3Gb/s ports
Supported RAID	Support RAID 0,1,5,10
LAN	Intel® Gigabit LAN
USB	2 x USB 3.0/2.0 ports at rear 13 x USB 2.0/1.1 ports (6 ports at mid-board, 6 ports at rear, 1 port at rear is also for ROG connect)
BIOS	16 Mb Flash ROM AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.4, ACPI2.0a Multi-Language BIOS
Internal I/O	3 x USB connectors supports additional 6 USB 2.0 ports 1 x IEEE 1394a connector 1 x S/PDIF Out connector 1 x En/Dis-able Clr CMOS connector Front panel audio connector 8 x SATA connectors: 6 x SATA 6Gb/s connectors (Red) & 2 x SATA 3Gb/s connectors (Gray) 8 x Fan connectors: 1 x CPU / 1 x PWR / 3 x Chassis / 3 x Optional 7 x ProbeIt measurement points 3 x Thermal sensor connectors 1 x 24-pin ATX power connector 1 x 8-pin ATX 12V power connector 2 x EZ Plug connectors (4-pin Molex Power connectors) 1 x OC Station header 1 x RC Bluetooth header 1 x Core unlocker switch 1 x Power on switch 1 x Reset switch 1 x Go Button 1 x BIOS switch button 1 x Fan connector for thermal module 1 x ROG light connector
External I/O	2 x External SATA 1 x S/PDIF Out (Optical) 1 x IEEE 1394a 1 x LAN(RJ45) port 8 -Channel Audio I/O 1 x Clr CMOS switch 1 x PS/2 Keyboard port(purple) 2 x USB 3.0/2.0 ports 7 x USB 2.0/1.1 ports (1 port is also for ROG Connect) 1 x ROG Connect On/Off switch 1 x RC Bluetooth switch
Form Factor	EATX
Dimension	30.5 cm x 26.9 cm