ASUS Socket 1156/Intel H55/HDMI/A and V and GbE/MATX Motherboard P7H55-M PRO CPU:Socket 1156 Support Intel Core i7/ Core i5/ Core i3/ Pentium Processors Memory: 4x 240pin DDR3-2133(OC)/1333/1066 DIMMs, Non-ECC/Unbuffered, Dual Channel, IDE/SATA: 1x ATA-133 Channel, 6x SATA2 Ports Video: Built-in graphics controller, with up to 1784MB shared memory Audio: Realtek 8-Channel High-Definition Audio CODEC, with noise filter; Support BD audio layer content protection LAN: Ports: 12x USB 2.0 Ports(6 rear, 6 by header); 1x PS/2 Port; 1x HDMI Port; 1x DVI Port; 1x VGA Port; 1x Optical S/PDIF-Out Port; Support Intel Turbo Boost Technology Chipset: Intel H55 Express,On-board Gigabit Ethernet Controller, with ASUS Express Gate 1x RJ45 LAN Port; Audio I/O Jacks Power Connector: 1x 24pin Main Power; 1x 8pin CPU Power; ASUS 4+2 Phase Power Design Upto 16GB Slots: 1x PCI-Express 2.0 x16 Slot; 2x PCI-Express 2.0 x1 Slot; 2x PCI Slot