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ASUS TUF Gaming B850M-Plus WiFi mATX motherboard with Ryzen 7 9800X3D CPU, dark grey heatsinks and yellow accents

ASUS

ASUS TUF GAMING B850M-PLUS WIFI AMD motherboard & Ryzen 7 9800X3D combo

SKU CH-CEV4-AAF2S

Combines an AMD AM5 micro-ATX board with 14+2+1 80A DrMOS stages, DDR5 up to 8000+ MT/s, PCIe 5.0 x16, three M.2 slots, Wi-Fi 6E, 2.5Gb LAN and USB 20Gbps Type-C with a Ryzen 7 9800X3D processor

  • CPU socketAM5
  • ChipsetAMD B850
  • Form factorMicro ATX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to 8000+MT/s (OC)
  • Max supported RAM192 GB

Motherboard TUF GAMING B850M-PLUS WIFI

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CPU + Ryzen 7 9800X3D

  • Ready for AMD Ryzen 9000, 8000 and 7000 series processors with AM5 socket
  • Stable power delivery via 14+2+1 80A DrMOS stages and 8-layer PCB
  • Fast storage with one PCIe 5.0 M.2 slot and two PCIe 4.0 M.2 slots
  • High-speed connectivity including Wi-Fi 6E, 2.5Gb Ethernet and USB 20Gbps Type-C
  • Comprehensive cooling with enlarged VRM, M.2 and PCH heatsinks plus Fan Xpert 4

Combo ready for AM5 gaming and AI workloads

This bundle pairs an ASUS TUF GAMING B850M-PLUS WIFI motherboard with an AMD Ryzen 7 9800X3D processor. The board uses the AMD B850 chipset on an AM5 socket and supports Ryzen 9000, 8000 and 7000 series CPUs. Four DDR5 slots accept up to 192 GB of memory running at 8000+ MT/s with EXPO and AEMP profiles. It targets builders who want a compact mATX platform for high-refresh gaming and emerging AI applications.

Thermals noise and power draw in normal use

The 14+2+1 80A DrMOS power stages sit on an 8-layer PCB with alloy chokes and durable capacitors, fed by dual 8+8 pin ProCool connectors for stable delivery. Enlarged VRM and M.2 heatsinks plus a PCH heatsink handle heat from the CPU and storage, while hybrid fan headers and Fan Xpert 4 software let you tune airflow. Wi-Fi 6E and 2.5 Gbps LAN add connectivity without extra cards that increase system power.

Upgrade path from older AM4 or early AM5 builds

Moving from an AM4 system or a first-gen AM5 board gains PCIe 5.0 on the primary x16 slot and M.2_1, plus a rear USB 20 Gbps Type-C port and front USB 10 Gbps Type-C header. The 2nd-gen 3D V-Cache design in the 9800X3D lifts gaming frame rates over non-X3D 7000 series chips. DIY features such as PCIe Slot Q-Release, M.2 Q-Latch, Q-Antenna and BIOS FlashBack simplify the swap.

How it compares

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

Price $824.99
Pricier than about 79% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model nameTUF GAMING B850M-PLUS WIFI+R7 9800 × 3D
Processor
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to 8000+MT/s (OC)
Max supported RAM192 GB
Memory channelsDual Channel
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
AMD Ryzen 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)**
AMD B850 Chipset
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
SATA and RAID supportAMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1/5/10.
*RAID 5 Function is only supported by AMD Ryzen 9000 series CPU.
Audio & video
Audio chipRealtek ALC1220P
Sound channelsRealtek ALC1220P 7.1 Surround Sound High Definition Audio CODEC
- Impedance sense for front and rear headphone outputs
- Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in)
- Supports up to 32-Bit/192 kHz playback*
Audio Features
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
- Audio cover
- Unique de-pop circuit
* Due to limitations in HDA bandwidth, 32-Bit/192
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 ax
Bluetooth support5.3
Ports & slots
PCIe 5.0 x16 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot (supports x16 mode)
PCIe 4.0 x16 slotsAMD Ryzen 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
PCIe x1 slotsAMD B850 Chipset
1 x PCIe 4.0 x1 slot
Onboard USB headers1 x USB 10 Gbit/s connector (supports USB Type-C)
1 x USB 5 Gbit/s header supports 2 additional USB 5 Gbit/s ports
2 x USB 2.0 headers support 3 additional USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V CPU Power connectors
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
BIOS256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

How do I install the Ryzen 7 9800X3D into the AM5 socket on the TUF GAMING B850M-PLUS WIFI, and what step do builders often miss?

Align the triangle marker on the Ryzen 7 9800X3D with the socket corner, lower the CPU gently without force, close the retention arm, then connect both the 8-pin and the second 8-pin ProCool power cables; the extra 8-pin is frequently overlooked but required for the 14+2+1 80A DrMOS stages.

What maintenance or replacement will the TUF GAMING B850M-PLUS WIFI need during its service life?

Dust the enlarged VRM heatsink, the M.2 heatsink and the PCH heatsink regularly so the 14+2+1 80A DrMOS stages and the PCIe 5.0 M.2 slot stay cool; clean the hybrid fan headers and check Fan Xpert 4 curves if temperatures rise.

What limit appears first when the Ryzen 7 9800X3D and TUF GAMING B850M-PLUS WIFI run sustained heavy workloads?

The VRM thermal ceiling of the 14+2+1 80A DrMOS stages is reached before the CPU hits its own throttle point, so case airflow and fan-curve tuning in Fan Xpert 4 become the deciding factor for stable clocks.

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