Product Detail Socket 1156 CPU (Max Support) i5/i7 AM3 CPU Ready N/A FSB / Hyper Transport Bus 6.4GT/s Chipset Intel P55 DDR2 Memory N/A DDR3 Memory DDR3 1066/1333/1600*/2000*/2133* (OC) Memory Channel Dual DIMM Slots 4 Max Memory (GB) 16 PCI-Ex16 2 PCI-E Gen 2.0 Gen2 (1x16, 1x4) PCI-Ex1 1 PCI 1 IDE 1 SATA 6 RAID 0/1/5/10 LAN 10/100/1000*1 TPM 1 USB ports (Rear) 10 Audio ports (Rear) 6 1394 ports (Rear) 1 eSATA 2 1 Phase DrMOS > 4 Phase Traditional MOSFET 3-in-1 server class power component, 400% faster than traditional MOSFET Offers excellent energy-saving capability and high-computing performance. High Efficiency: Up to 96% Efficiency Increase: +38.3% Lower Power Loss: -4.01W (64% Max Saving) APS is Active Phase Switching, that is complete function to Control Power Demand With Switcing Dynamically, it?s for CPU, Memory and Chipset PWM. . The "MSI LGA 1156 Intel P55 Micro ATX Intel Motherboard P55M-GD45" is best product for you. We recommended MSI LGA 1156 Intel P55 Micro ATX Intel Motherboard P55M-GD45