INTEL G31 CHIPSET , SUPPORT 2XSATA , 4XBACK USB PORT , Processor SupportSupports Intel Pentium HT(Hyper ... Panel Audio pinheaderSlots1 PCI Express x16 slot 2 PCI slots Support 3.3V / 5V PCI bus InterfaceForm FactorMicro-ATX (24cm X ... )Mounting6 mounting holes ESONIC ZILLION MOTHERBOARD MAINBOARD G31CDL,G31FCCL2,G31FCBL , SUPPORT 4*BACK USB PORTS