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Micro ATX motherboard with black PCB and silver heatsinks

ASUS

ASUS PRIME B450M-A AMD B450 DDR4 128GB Micro ATX motherboard

SKU CH-TDN4-C7SH4

Micro-ATX board for Socket AM4 CPUs with AMD B450 chipset supporting up to 128GB of DDR4 memory

  • CPU socketSocket AM4
  • ChipsetAMD B450
  • Max supported RAM128 GB
  • Supports up to 128GB DDR4 memory for demanding multitasking
  • AMD B450 chipset provides a stable platform for AM4 CPUs
  • Micro ATX form factor fits compact builds without sacrificing expandability
  • Includes SATA cable and I/O shield for immediate installation
  • 100% inspected used board with CMOS battery for reliable operation

Micro ATX AM4 board for DDR4 builds

The ASUS PRIME B450M-A is a Socket AM4 motherboard built around the AMD B450 chipset for compact DDR4 systems. It fits Micro ATX cases and supports up to 128GB of memory across four slots. The board targets builders who want a standard AM4 foundation without a full-size ATX footprint.

Rear I/O shield and single SATA cable in the box

A chassis I/O back panel is included so the rear ports align cleanly with the case cut-out. One SATA cable ships with the board for a first drive connection; additional cables are sourced separately. The package also supplies a fresh CMOS battery, and the description notes a Wi-Fi antenna only when the specific model variant includes an onboard Wi-Fi module.

Standard B450 thermals

The B450 chipset and AM4 voltage regulators run at typical desktop temperatures under ordinary workloads. No active chipset fan is present, so system airflow handles the heat. Power draw stays within normal AM4 platform limits for the supported processors.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $89.99
Cheaper than about 79% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineASUS PRIME B450M-A
Model nameASUS PRIME B450M-A
Processor
CPU socketSocket AM4
ChipsetAMD B450
Memory
Max supported RAM128 GB

More in Motherboards for AMD CPUs

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