M4N72-E CPUAMD Socket AM2+ / AM2 Phenom™ X4/Phenom™ X3/Athlon™ /Athlon™ X2/Sempron™ Processors Support AM3 Phenom™ II / Athlon™ X4 / Athlon™ X3 / Athlon™ X2 Processors AMD 140W CPU Support AMD Cool 'n' Quiet™ Technology Support 45nm Phenom™ II CPU ChipsetNVIDIA nForce 750a SLI System BusUp to 5200 MT/s HyperTransport™ 3.0 interface for AM3/AM2+ CPU 2000 / 1600 MT/s for AM2 CPU Memory4 x DIMM, Max. 16 GB, DDR2 1066*/800/667 ECC,Non-ECC,Un-buffered Memory Dual Channel memory architecture *Due to AMD CPU limitation, DDR2 1066 is supported by AM3/AM2+ CPU for one DIMM per channel only. Refer to www.asus.com for the memory QVL (Qualified Vendors Lists). **Due to OS limitation, when installing total memory of 4GB capacity or more, Windows® 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended. Expansion Slots2 x PCIe 2.0 x16 (Single x16 or Dual x8) 2 x PCIe x1 2 x PCI 2.2 Multi-GPU SupportSupport NVIDIA® SLI™ Technology at x8 link Storage NVIDIA nForce 750a SLI chipset - 1 x Ultra DMA 133 / 100 - 6 x SATA 3Gb/s ports (Legacy IDE operation is only supported on drives 1–4.) - NVIDIA® MediaShield™ RAID supports RAID 0, 1, 0+1, 5, and JBOD LANRealtek 8211CL Gigabit/10 LAN controller featuring AI NET 2 AudioVIA1708S 8 -Channel High Definition Audio CODEC - Supports Jack-Detection, Multi-Streaming, and Front Panel Jack-Retasking - Optical S/PDIF Out ports at back I/O - ASUS Noise Filtering IEEE 1394VIA VT6315N controller supports 2 x 1394a ports USB12 USB 2.0 ports (6 ports at mid-board, 6 ports at back panel) ASUS Unique FeaturesASUS Power Saving Solutions: - 8+1 Phase Power Design - ASUS Anti-Surge Protection ASUS Green Design: - EPU *ASUS EPU is supported by AM3/AM2+ CPU only - ASUS AI Nap Express Gate ASUS Quiet Thermal Solution: - ASUS Fanless Design:stylish heatsink solution - ASUS Q-Fan2 ASUS EZ DIY: - ASUS Q-Connector - ASUS CrashFree BIOS 2 - ASUS O.C. Profile - ASUS EZ Flash 2 Overclocking FeaturesIntelligent overclocking tools - AI Overclocking (intelligent CPU frequency tuner) -TurboV -Turbo Key SFS (Stepless Frequency Selection) - FSB tuning from 200MHz up to 600MHz at 1MHz increment - Memory tuning from 533MHz up to 1066MHz Overclocking Protection - ASUS C.P.R.(CPU Parameter Recall) Special Features100% All High-quality Conductive Polymer Capacitors! (5000hrs VRM, over 57 years operation lifespan at 65°C) ASUS MyLogo 2 Back Panel I/O Ports1 x PS/2 Keyboard 1 x PS/2 Mouse 1 x S/PDIF Out (Optical) 1 x IEEE 1394a 1 x LAN(RJ45) port 6 x USB 2.0/1.1 8 -Channel Audio I/O Internal I/O Connectors3 x USB connectors (6 ports) 1 x Floppy disk drive connector 1 x IDE connector 6 x SATA connectors 1 x IEEE 1394a connector 1 x CPU Fan connector 1 x Chassis Fan connector 1 x Power Fan connector 1 x S/PDIF Out connector Front panel audio connector Chassis Intrusion connector 1 x COM connector CD audio in 24-pin ATX Power connector 4-pin ATX 12V Power connector System Panel (Q-Connector) BIOS8 Mb Flash ROM AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.5, ACPI 2.0, ASUS EZ Flash 2, CrashFree BIOS 2 AccessoriesUser's manual 1 x UltraDMA 133/100/66 cable 4 x SATA cable I/O Shield Support DiscDrivers ASUS PC Probe II Express Gate ASUS AI Suite Anti-virus software (OEM version) ASUS Update Form FactorATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )