MSI B450M Mortar Max SATA 6Gb/s USB 3.1 HDMI AMD motherboard

AM4 Micro-ATX board for Ryzen builds

The MSI B450M Mortar Max uses the AMD B450 chipset and an AM4 socket to support Ryzen Series processors. Four DDR4 slots accept up to 128GB of memory in dual-channel mode. Two full-length PCIe 3.0 x16 slots and two PCIe x1 slots provide expansion room. Four SATA 6Gb/s ports and two M.2 connectors handle storage. Realtek RTL8111H-CG LAN delivers 1Gbps networking. Rear I/O includes DisplayPort, HDMI, PS/2, USB 3.2 Gen 2 Type-C, six USB 2.0 ports and 7.1-channel audio jacks.

Straightforward install with common pitfalls

Standard Micro-ATX mounting holes align with most cases. The 24-pin and 8-pin CPU power connectors sit in usual positions. Four 288-pin DDR4 slots use single-sided latches; press modules firmly until they click. M.2 drives secure with a single screw each — do not overtighten. SATA cables route cleanly along the board edge. The I/O shield comes pre-installed. Remember to update the BIOS before installing newer Ryzen CPUs, otherwise the system will not post.

Suits compact Ryzen systems.

This board fits builders wanting a small-footprint Ryzen platform with dual x16 slots for a single graphics card and extra PCIe devices. The 128GB memory ceiling covers most workloads. Users planning heavy multi-GPU arrays or high-core-count CPUs with sustained all-core loads should consider boards with stronger VRM cooling and additional PCIe lanes. The single 1Gbps LAN port limits network throughput for server-style tasks.