The MSI P55-GD61 is an Intel P55 (LGA1156) ATX motherboard designed for 1st Gen Intel Core i7/i5/i3 and Pentium processors. It features a robust 6+1 phase power design supporting DDR3 memory with XMP profiles up to 2200MHz(OC) across 4 DIMM slots with a maximum capacity of 16GB. The board provides 3 PCIe 2.0 x16 slots (running at x16/x8/x4 mode) with military-class components for enhanced durability. Storage conNECtivity includes 6 SATA 3Gbps ports supporting RAID 0/1/5/10 configurations and 1 eSATA port. Networking is handled by a Realtek 8111DL Gigabit LAN controller. The motherboard features 8-channel HD audio with optical S/PDIF out, 12 USB 2.0 ports (6 rear + 6 via headers), and legacy PS/2 ports. Additional highlights include MSI's OC Genie one-button overclocking technology, DrMOS power efficiency design, and Active Phase Switching for dynamic power management. The board also includes voltage measurement points for advanced overclockers and supports ATI CrossFireX multi-GPU configurations.