*CPU Supports Intel® i3 / i5 / i7 based processors in LGA1156 package. Please refer to CPU Support for compatible CPU; the above description is for reference only. *Chipset - Intel® H55 Chipset - Supports QPI up to 6.4GT/s - Hi-Speed USB (USB2.0) controller, 480Mb/sec. - 6 SATAII ports with transfer rate up to 3Gb/s. - PCI Master v2.3, I/O APIC. - ACPI 2.0 compliant. *Main Memory Supports two unbuffered DIMM of 1.5 Volt DDR3 1066/1333/1600* (OC) DRAM, 8GB Max - Supports 1Gb/ 2Gb/ 4Gb DRAM size - Supports Dual channel mode *Slots 1 PCI Express gen2 x16 slot 2 PCI Express gen2 x1 slots 1 PCI slots, support 3.3V/ 5V PCI bus Interface *On-Board SATA SATAII controller integrated in Intel H55 chipset - Up to 3Gb/s transfer speed. - Supports six SATAII ports by H55 *Audio Chipset integrated by Realtek® ALC887 - Flexible 8-channel audio with jack sensing - Compliant with Azalia 1.0 Spec - Meet Microsoft Vista Premium spec *LAN Supports one PCI Express LAN 10/100/1000 Fast Ethernet by Realtek 8111E. *Internal I/O Connectors - ATX 24-Pin power connector - 4-pin ATX 12V power connector - CPU x 1 / System x 2 FAN connectors - Front panel audio connector - Front panel connector - 1 x chasis intrusion connector - 3 x USB 2.0 connectors - 6 x Serial ATAII connectors - 1 x Clear CMOS jumper - 1 x SPDIF-out connector - 1 x TPM module connector - 1 x Serial port connector - 1 x Parallel port connector *Back Panel I/O Ports - 1 x PS/2 Mouse - 1 x PS/2 Keyboard - 1 x HDMI port - 4 x USB 2.0 ports - 1 x Graphic Card port - 1 x DVI port - 1 x RJ45 LAN Jack - 1 x 3 in 1 audio jack *HDMI, VGA & DVI-D ports can only work with CPUs with GPUs core inside. *BIOS The mainboard BIOS provides "Plug & Play" BIOS which detects the peripheral devices and expansion cards of the board automatically. The mainboard provides a Desktop Management Interface(DMI) function which records your mainboard specifications. *Dimension 24.5cm(L) x 21.0cm(W) M-ATX Form Factor