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Green micro-ATX board with black heatsinks and yellow accents

ASUS

ASUS TUF GAMING B550M-E AMD B550 DDR4 Micro ATX Motherboard

SKU CH-AGKZ-SPF1N

Micro ATX AM4 board with AMD B550 chipset, dual M.2 slots, four SATA III ports and 7.1-channel audio for Ryzen CPUs

  • CPU Socket TypeAM4
  • CPU TypeRyzen Series
  • ChipsetAMD B550
  • Form FactorMicro ATX
  • Supports up to 128 GB DDR4 memory for large workloads
  • Two M.2 slots accept PCIe 3.0 and SATA drives
  • HDMI 2.1 output enables 4K high-refresh displays
  • 1-channel audio provides immersive sound
  • Micro ATX form factor fits compact cases

Micro ATX board for Ryzen builds

The ASUS TUF GAMING B550M-E uses the AMD B550 chipset and an AM4 socket to support Ryzen 3, 5 and 7 processors. It fits micro ATX cases and provides four DDR4 slots with a maximum capacity of 128 GB. Two M.2 slots and four SATA III ports give plenty of room for SSDs and hard drives.

Thermals and power delivery

A 12 V power connector and an 8-pin EPS connector feed the CPU voltage regulators. Two chassis fan headers and a dedicated CPU fan header let the builder control airflow. The 24-pin ATX connector supplies the board itself, while the micro ATX layout keeps cable runs short inside smaller cases.

Bundled connectivity and software

The rear panel includes an HDMI 2.1 port for modern displays and a S/PDIF output for digital audio. Internal headers provide two USB 2.0 and two USB 3.2 Gen 1 ports for front-panel connections. A TPM header and an RGB LED header are also present for security modules and lighting control.

Highlights

  • Supports up to 128 GB DDR4 memory for large workloads
  • Two M.2 slots accept PCIe 3.0 and SATA drives
  • HDMI 2.1 output enables 4K high-refresh displays
  • 1-channel audio provides immersive sound
  • Micro ATX form factor fits compact cases

Specifications

CPU Socket TypeAM4
CPU TypeRyzen Series
ChipsetAMD B550
Form FactorMicro ATX

Questions about this item

How do I install a CPU into the Socket AM4 on this micro ATX board, and what step do people often miss?

Align the golden triangle on the Ryzen processor with the socket corner, lower the retention arm fully, then attach the cooler — many forget to remove the plastic protective cover from the socket before seating the CPU.

What maintenance or replacement will the board need later?

The primary upkeep is dust removal from the two chassis fan headers and CPU fan header; no user-replaceable components are specified for this micro ATX design.

Which limit appears first during sustained heavy loads on the B550 chipset?

Thermal throttling of the voltage regulators typically occurs before the chipset itself hits its ceiling, especially when all four SATA III ports and both M.2 slots are active.

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