The MSI H55M-E33 is a Micro ATX motherboard designed for Intel LGA1156 socket processors, featuring the Intel H55 chipset. This compact board supports DDR3 memory with speeds up to 1333MHz across 2 DIMM slots, offering a maximum capacity of 8GB. It includes 1 PCI Express 2.0 x16 slot for graphics expansion, along with 2 PCI slots for additional peripherals. Storage options consist of 4 SATA 3Gb/s ports supporting RAID 0, 1, 5, and 10 configurations. The onboard Realtek ALC887 audio codec delivers 7.1-channel HD audio, while networking is handled by a Realtek 8111DL Gigabit LAN controller. Video outputs include VGA and DVI-D ports for flexible display conNECtivity. The motherboard features MSI's proprietary technologies like Active Phase Switching for power efficiency and OC Genie for simplified overclocking. Additional conNECtivity includes 8 USB 2.0 ports (4 rear, 4 via headers), PS/2 keyboard/mouse ports, and serial/parallel port headers for legacy device support. The compact 24.4cm x 24.4cm form factor makes it suitable for space-constrained builds while maintaining essential features for mainstream computing needs.