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Green micro-ATX board with black heatsinks and silver AM4 socket

MSI

MSI B350M Mortar AMD B350 motherboard Socket AM4 DDR4 64GB

SKU CH-PTRK-9RBPB

Micro-ATX board for AM4 Ryzen CPUs with dual-channel DDR4 up to 3200 OC, one PCIe 3.0 x16, four SATA III, Realtek ALC892 7.1 audio and gigabit LAN

  • CPU Socket TypeSocket AM4
  • CPU TypeAMD first and second generation AMD Ryzen/Ryzen with Radeon
  • ChipsetAMD B350
  • Memory StandardSupports dual-channel DDR4 1866/2133/2400/2667 (OC)/2933 (OC
  • Maximum Memory Supported64GB
  • PCI Slots1 x PCIe 3.0 x16 slot - RYZEN series processors support x16
  • Supports up to 64GB dual-channel DDR4 memory
  • PCIe 3.0 x16 slot runs at x16 with Ryzen CPUs
  • Realtek ALC892 codec delivers 7.1 channel audio
  • Realtek 8111H provides Gigabit LAN connectivity
  • Four USB 3.1 Gen1 plus six USB 2.0 ports available

Socket AM4 Ryzen board

The MSI B350M Mortar is a micro-ATX motherboard built around the AMD B350 chipset for Socket AM4 processors. It supports first and second generation Ryzen CPUs as well as AMD A-series and Athlon chips with AM4 pins. Dual-channel DDR4 memory runs at speeds from 1866 up to 3200 MHz when overclocked, with a maximum capacity of 64 GB. A single PCIe 3.0 x16 slot, one PCIe 2.0 x16 slot at x4 mode and two PCIe 2.0 x1 slots provide expansion room.

Check CPU generation and cooler mounting

Verify that your processor is a first or second generation Ryzen, Ryzen with Radeon Vega graphics, A-series or Athlon AM4 part before ordering. Seventh generation A-series and Athlon CPUs operate the primary slot at x8 instead of x16. Ensure your case accepts micro-ATX dimensions and that the CPU cooler mounting holes match the AM4 pattern. Confirm the power supply delivers the required ATX and CPU power connectors for this board.

Bundled I/O shield, battery and SATA cable

The package includes a chassis I/O back panel, a CMOS battery and one SATA cable so you can connect a drive immediately. No Wi-Fi antenna is supplied because the board lacks a built-in Wi-Fi module. Audio uses the Realtek ALC892 codec for 7.1 channel output and networking relies on the Realtek 8111H Gigabit LAN controller. Four USB 3.1 Gen1 ports and six USB 2.0 ports are available through rear and onboard headers.

Highlights

  • Supports up to 64GB dual-channel DDR4 memory
  • PCIe 3.0 x16 slot runs at x16 with Ryzen CPUs
  • Realtek ALC892 codec delivers 7.1 channel audio
  • Realtek 8111H provides Gigabit LAN connectivity
  • Four USB 3.1 Gen1 plus six USB 2.0 ports available

Specifications

BrandMSI
SeriesMSI B350M MORTAR
ModelMSI B350M MORTAR
CPU Socket TypeSocket AM4
CPU TypeAMD first and second generation AMD Ryzen/Ryzen with Radeon Vega graphics card processors and AMD A series/Ryzen processors with AM4 pins
ChipsetAMD B350
Memory StandardSupports dual-channel DDR4 1866/2133/2400/2667 (OC)/2933 (OC)/3200 (OC) MHz memory
Maximum Memory Supported64GB
PCI Slots1 x PCIe 3.0 x16 slot
- RYZEN series processors support x16 mode
- 7th Gen A-series/Athlon processors support x8 mode
1 x PCIe 2.0 x16 slot (supports x4 mode)
2 x PCIe 2.0 x1 slots *
SATA RAID1XM.2 interface, 4xSATA III interface
Audio ChipsetRealtek ALC892 decoding chip
- 7.1 channel high-quality sound effects
LAN Chipset1 Realtek 8111H Gigabit network interface card
Onboard USBAMD B350 chipset
- 4 USB 3.1 Gen1 (SuperSpeed USB) ports are provided via the onboard USB port
- 6 USB 2.0 (High-speed USB) ports (2 Type-A ports on the backplane, 4 via onboard USB ports)
AMD CPU
- 4 USB 3.1 Gen1 (SuperSpeed USB) ports (3 Type-A and 1 Type-C ports on the backplane)

Questions about this item

What accessories come in the box and what must be purchased separately?

The package includes the motherboard, a CMOS battery, one SATA cable and the chassis I/O back panel. CPU, DDR4 memory, storage drives, graphics card and power supply are not included.

Which DDR4 speeds does the board support and how much memory can be installed?

Dual-channel DDR4 at 1866, 2133, 2400, 2667 (OC), 2933 (OC) and 3200 (OC) MHz is supported, with a maximum capacity of 64 GB.

How does the single PCIe 3.0 x16 slot behave with different AM4 processors?

With Ryzen series CPUs the slot runs at x16; with 7th Gen A-series or Athlon CPUs it runs at x8 mode.

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