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Green Micro ATX board with silver heatsinks and black PCB

ASUS

ASUS TUF GAMING B550M-PLUS AMD motherboard

SKU CH-1GG8-2ASAH

Micro-ATX AM4 board with PCIe 4.0, 2.5 Gb LAN, dual M.2 slots, HDMI 2.1, USB 3.2 Gen 2 and 7.1 audio

  • ProcessorBIOS update might require for AMD Zen 3 Ryzen 5000 series CP
  • ChipsetAMD B550
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memory3rd Gen AMD Ryzen Processors DDR4 4600(O.C)/ 4400(O.C)/ 4266
  • Supports 3rd Gen Ryzen CPUs with PCIe 4.0 x16 slot
  • Reliable power delivery via 8+2 DrMOS stages and alloy chokes
  • Fanless VRM heatsink plus hybrid fan headers for thermal control
  • 5 Gb LAN with LANGuard for high-speed networking
  • Dual M.2 slots with one PCIe 4.0 x4 and HDMI 2.1 output

AM4 socket board for 3rd Gen Ryzen

The ASUS TUF GAMING B550M-PLUS is a Micro ATX motherboard built around the AMD B550 chipset and AM4 socket. It targets builders who want PCIe 4.0 support for 3rd Gen AMD Ryzen CPUs. Four DDR4 slots accept up to 128GB of memory. A BIOS update may be required before installing a Ryzen 5000 series processor.

Fanless VRM heatsink with hybrid fan control

The power delivery uses 8+2 DrMOS stages, alloy chokes and durable capacitors to feed high-count-core CPUs. A fanless VRM and chipset heatsink handles normal loads silently. Multiple hybrid fan headers are managed through Fan Xpert 4 or UEFI Q-Fan Control for automatic speed curves. The 2.5Gb LAN with LANGuard adds wired throughput without extra power draw.

Dual M.2 slots and front-panel USB 3.2 Gen 2

One M.2 slot runs at PCIe 4.0 x4 and the second at PCIe 3.0 x4, both supporting 2242, 2260, 2280 and 22110 lengths in NVMe or SATA modes. Four SATA 6Gb/s ports provide additional storage. Rear I/O includes HDMI 2.1, DisplayPort 1.2, USB 3.2 Gen 2 Type-C and Type-A. SupremeFX S1220A audio with DTS Sound Unbound and Sonic Studio III drives 7.1 channels. An addressable Gen 2 RGB header supports AURA Sync lighting.

How it compares

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

Price $154.99
Cheaper than about 61% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model nameTUF GAMING B550M-PLUS
Processor
ProcessorBIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASUS website for CPU support list.
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memory3rd Gen AMD Ryzen Processors
DDR4 4600(O.C)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory *
Next Generation AMD Ryzen PRO Processors
DDR4 4800(O.C.)/ 4600(O.C)/ 4466(O.C.)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory *
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
Max supported RAM128 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots3rd Gen AMD Ryzen Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 & SATA modes)
AMD B550 Chipset
M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes)
SATA and RAID support0/1/10
Graphics
Onboard video chipSupported only by CPU with integrated graphic:
1 x DisplayPort 1.2
1 x HDMI 2.1 (4K@60 Hz)
Audio & video
Audio chipRealtek ALC S1200A High Definition Audio CODEC
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek RTL8125B
Maximum network speed2.5 Gbit/s
Ports & slots
PCIe 4.0 x16 slots3rd Gen AMD Ryzen Processors
1 x PCIe 4.0 x16 slot (supports x16 mode)
PCIe 3.0 x16 slotsAMD B550 Chipset
1 x PCIe 3.0 x16 slot (supports x4 mode)
PCIe x1 slots1 x PCIe 3.0 x1 slot
* Support PCIe bifurcation for RAID on CPU function.
Rear panel ports2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C)
4 x USB 3.2 Gen 1 ports (4 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI port
1 x Realtek RTL8125B 2.5Gb Ethernet port
5 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
1 x PS/2 Keyboard/Mouse combo port
Onboard USB headers1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

How do I install the board in a Micro-ATX case without bending the 2.5 Gb LAN port shield?

Align the I/O shield first, lower the board straight down so the LAN port clears the cut-out, then secure all standoff screws; the port sits close to the edge and bends if the board is tilted during insertion.

Which component will need attention after several years of continuous operation?

The Realtek RTL8125B 2.5 Gb LAN controller and the Realtek ALC S1200A audio codec are soldered; if either fails the board requires professional replacement.

What thermal limit appears first when the 8+2 DrMOS power stages run a high-core-count CPU at full load?

The fanless VRM heatsink saturates first; sustained loads push VRM temperatures up until case airflow or added active cooling reduces them.

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