MSI B450M MORTAR Motherboard Quick Installation Guide

About this manual

This quick installation guide walks you through preparing tools, installing the AM4 CPU, DDR4 memory modules, SATA devices, M.2 SSDs, graphics card, front‑panel connectors and power connections for the MSI B450M Mortar motherboard. Video links are provided for each major step.

The document also includes a specifications section, safety information, a wiring diagram of the rear I/O panel, and a troubleshooting guide covering power, display, audio and network issues. This manual is written in Chinese.

What's inside

• Preparing Tools and Components
• Installing the Processor
• Installing DDR4 Memory
• Connecting Front‑Panel Connectors
• Mounting the Motherboard
• Installing SATA Devices
• Installing the Graphics Card
• Connecting Power Interfaces
• Power‑On Procedure
• Safety Information

Specifications

Frequently asked questions

Why does the motherboard not power on?

Check that the ATX_PWR1 and CPU_PWR1 power connectors are fully plugged in, ensure the PSU switch is on, and verify the front‑panel power‑switch header (JFP1) is correctly connected.

What should I do if I hear a long beep during POST?

Remove all memory modules, then install a single DIMM in slot DIMMA2 and restart the computer.