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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

  • CPU Socket TypeAM4
  • CPU TypeBIOS update might require for AMD Zen 3 Ryzen 5000 series CP
  • ChipsetAMD B550
  • Number of Memory Slots4x288pin (DDR4)
  • Memory Standard3rd Gen AMD Ryzen Processors DDR4 4600(O.C)/ 4400(O.C)/ 4266
  • Maximum Memory Supported128GB
  • 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.

Highlights

  • 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

Specifications

BrandASUS
ModelTUF GAMING B550M-PLUS
CPU Socket TypeAM4
CPU TypeBIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASUS website for CPU support list.
ChipsetAMD B550
Number of Memory Slots4x288pin (DDR4)
Memory Standard3rd 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).
Maximum Memory Supported128GB
Channel SupportedDual Channel
PCI Express 4.0 x163rd Gen AMD Ryzen Processors
1 x PCIe 4.0 x16 slot (supports x16 mode)
PCI Express 3.0 x16AMD B550 Chipset
1 x PCIe 3.0 x16 slot (supports x4 mode)
PCI Express x11 x PCIe 3.0 x1 slot
* Support PCIe bifurcation for RAID on CPU function.
Serial ATA (SATA)4 x SATA 6Gb/s
M.23rd 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 RAID0/1/10
Onboard Video ChipsetSupported only by CPU with integrated graphic:
1 x DisplayPort 1.2
1 x HDMI 2.1 (4K@60HZ)
Audio ChipsetRealtek ALC S1200A High Definition Audio CODEC
Audio Channels7.1 Channels
LAN ChipsetRealtek RTL8125B
Max LAN Speed2.5Gbps
Back I/O 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 USB1 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
Other ConnectorsFan and cooling related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
2 x 4-pin Chassis Fan headers
Miscellaneous
1 x AURA Addressable Gen 2 header
2 x AURA RGB headers
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (AAFP)
1 x Speaker header
1 x SPI TPM header (14-1pin)
1 x 10-1 pin System Panel header
Form FactorMicro ATX
LED LightingRGB
Dimensions (W x L)9.6" x 9.6"
Power Pin1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
Windows 11Supported
FeaturesMulti-GPU Support:
Supports AMD 2-Way CrossFireX Technology
ASUS Exclusive Software:
Armoury Crate
- Aura Creator
- Aura Sync
- AI Noise Cancelling Microphone
AI Suite 3
- Performance And Power Saving Utility
TurboV EVO
EPU
Digi+ VRM
Fan Xpert 2+
- EZ update
TUF GAMING CPU-Z
AI Charger
ASUS Turbo LAN
DAEMON Tools
DTS Custom for GAMING Headsets
Norton Anti-virus software (Free Trial for 60 days)
WinRAR
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
ASUS Special Features:
ASUS TUF PROTECTION
- ASUS DIGI+ VRM (Digital power design with Dr. MOS)
Package ContentsAccessories:
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x I/O Shield
1 x M.2 Rubber Package
1 x M.2 SSD screw package
1 x TUF Gaming sticker
Installation Media
1 x Support DVD
Documentation
1 x TUF Certification card
1 x User manual

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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