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Black Micro ATX motherboard with silver heatsinks and AM4 socket

MSI

MSI B450M Mortar AMD B450 AM4 DDR4 64GB Micro ATX motherboard

SKU CH-QTX8-85PQF

Micro ATX board for first and second generation Ryzen CPUs, dual-channel DDR4 up to 3466 MHz and 64 GB, with a PCIe 3.0 x16 slot, four SATA III ports, Realtek 7.1 audio and Gigabit LAN

  • CPU Socket TypeSocket AM4
  • CPU TypeFirst and second generation AMD Ryzen processors with AM4 pi
  • ChipsetAMD B450
  • Memory StandardSupport dual-channel DDR4 1866/2133/2400/2666/2800/2933/3000
  • Maximum Memory Supported64GB
  • PCI Slots1 PCIe 3.0 x16 slot (PCI_E1) First and second generation AMD
  • Supports first and second generation Ryzen processors via Socket AM4
  • Dual-channel DDR4 up to 3466MHz for fast memory performance
  • 64GB maximum memory capacity handles heavy workloads
  • PCIe 3.0 x16 slot delivers full bandwidth for graphics cards
  • Realtek ALC892 provides 7.1-channel high-quality audio output

AM4 Micro ATX Motherboard

The MSI B450M Mortar uses the AMD B450 chipset on a Micro ATX form factor with Socket AM4. It supports dual-channel DDR4 memory at speeds from 1866 to 3466 MHz up to a maximum of 64 GB.

Builders needing legacy AM4 support

This board suits builders upgrading or repairing existing AM4 systems with first or second generation Ryzen CPUs. It does not suit new builds targeting current sockets or chipsets that require newer memory standards or PCIe generations.

PCIe 3.0 x16 primary slot

The top slot runs at PCIe 3.0 x16 with first and second generation Ryzen processors, while the second full-length slot is wired for PCIe 2.0 x4 mode. This lane allocation decides whether a given graphics card or add-in card can run at its intended bandwidth.

Points forts

  • Supports first and second generation Ryzen processors via Socket AM4
  • Dual-channel DDR4 up to 3466MHz for fast memory performance
  • 64GB maximum memory capacity handles heavy workloads
  • PCIe 3.0 x16 slot delivers full bandwidth for graphics cards
  • Realtek ALC892 provides 7.1-channel high-quality audio output

Caractéristiques

BrandMSI
SeriesMSI B450M MORTAR
ModelMSI B450M MORTAR
CPU Socket TypeSocket AM4
CPU TypeFirst and second generation AMD Ryzen processors with AM4 pins and RadeonVega graphics
ChipsetAMD B450
Memory StandardSupport dual-channel DDR4 1866/2133/2400/2666/2800/2933/3000/3066/3200/3466MHz memory
Maximum Memory Supported64GB
PCI Slots1 PCIe 3.0 x16 slot (PCI_E1)
First and second generation AMD Ryzen processors support x16 speed
Ryzen processors with RadeonVega graphics support x8 speeds
1 PCIe 2.0 x16 slot (PCI_E4, supports x4 mode)
2 PCIe 2.0 x1 slots
SATA RAID2XM.2 interface, 4xSATA III interface
Audio ChipsetRealtek ALC892 decoding chip
7.1-Channel high-quality sound effects
Supports S/PDIF output
LAN Chipset1 x Realtek RTL8111H-CG Gigabit network interface card
Onboard USBAMD B450 Chipset
1 USB 3.1 Gen2 (SuperSpeed USB 10Gbps) Type-C interface located on the backplane
1 USB 3.1 Gen2 (SuperSpeed USB 10Gbps) Type-A interface located on the backplane
6 USB 3.1 Gen1 (SuperSpeed USB) ports (4 Type-A ports on the backplane, 2 ports provided via the onboard USB 3.1 Gen1 port)
6 USB 2.0 (High-speed USB) interfaces (2 Type-A interfaces located on the backplane, 4 interfaces provided through the onboard USB 2.0 interface)

Questions sur cet article

Will the included CMOS battery need replacing and how long does it last?

The package includes one CMOS battery; typical life is several years before the system clock drifts or BIOS settings reset, so replacement is infrequent

What speed ceiling hits first when the board runs heavy loads for hours?

The single PCIe 3.0 x16 slot and two PCIe 2.0 x16 slots running at x4 and x1 limit GPU and add-in card bandwidth before the chipset becomes a bottleneck

How loud and hot does the VRM area get during all-day operation?

The Mortar uses a heatsink on the power phases and the B450 chipset runs cool enough that case airflow usually keeps temperatures and fan noise low

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