MSI H55M-P31 Intel H55 LGA 1156 DDR3 Micro ATX Motherboard

Intel H55 LGA 1156 Micro ATX Motherboard

The MSI H55M-P31 is a Micro ATX motherboard built on the Intel H55 chipset for Socket 1156 processors. It accepts Intel Core i3, i5 and i7 CPUs using the LGA 1156 interface and supports dual-channel DDR3 memory up to 16 GB. Six SATA II ports, one PCIe 2.0 x16 slot, one PCIe 2.0 x1 slot and a legacy PCI 2.3 slot provide internal expansion. Realtek ALC889 audio delivers 7.1-channel sound and a Realtek 8111DL controller handles Gigabit Ethernet. Six USB 2.0 ports are available on the rear I/O panel.

System builders upgrading

This board suits enthusiasts maintaining or assembling a legacy LGA 1156 system that requires dual-channel DDR3 and integrated graphics support through the H55 chipset. It fits Micro ATX chassis and provides the core connectivity of its era. Builders targeting newer sockets, different memory types or contemporary storage interfaces should select a current-generation motherboard instead.

Maximum 16 GB dual-channel DDR3 capacity

The memory controller limits total system memory to 16 GB across two channels using DDR3 modules rated up to 2133 MHz when overclocked. This ceiling determines whether the board can meet the RAM requirements of a planned LGA 1156 build.