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ASUS TUF B850M-PLUS WIFI motherboard and Ryzen 9 9900X CPU combo, mATX board with dark grey heatsinks and silver accents

ASUS

ASUS TUF GAMING B850M-PLUS WIFI AMD Motherboard & Ryzen 9 9900X Combo

SKU CH-META-9378X

Pairs a 12-core Ryzen 9 9900X with a B850 mATX board offering DDR5 to 8000 MT/s, PCIe 5.0 x16, three M.2 slots, Wi-Fi 6E and 2.5 Gb LAN

  • CPU Socket TypeAM5
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to 8000+MT/s (OC)
  • Maximum Memory Supported192GB
  • Channel SupportedDual Channel

Motherboard TUF GAMING B850M-PLUS WIFI

Struck-through versions exist but are not stocked here.

CPU + Ryzen 9 9900X

  • Ready for demanding AI workloads with AM5 platform power and connectivity
  • 12 cores and 24 threads on Zen 5 architecture boost up to 5.6 GHz
  • Stable delivery from 14+2+1 80A DrMOS stages on 8-layer PCB
  • Fast storage via one PCIe 5.0 and two PCIe 4.0 M.2 slots with heatsink
  • Wi-Fi 6E, 2.5Gb LAN, USB 20Gbps and 10Gbps Type-C ports

Combo ready for advanced AI workloads

This bundle pairs an ASUS TUF GAMING B850M-PLUS WIFI motherboard with an AMD Ryzen 9 9900X processor. The board uses the AMD B850 chipset and AM5 socket to support Ryzen 9000, 8000 and 7000 series CPUs. It targets builders who want a compact mATX platform with strong connectivity and power delivery for demanding applications.

Memory capacity up to 192GB DDR5

Four 288-pin slots accept dual-channel DDR5 up to 8000+ MT/s when overclocked, with EXPO and AEMP profiles for easier tuning. The CPU provides a PCIe 5.0 x4 M.2 slot for the fastest storage, while the chipset adds two PCIe 4.0 M.2 slots and four SATA 6Gb/s ports. A single PCIe 5.0 x16 slot handles graphics, and a PCIe 4.0 x1 slot covers add-in cards.

Upgrades from older AM4 or entry AM5 builds

The 12-core, 24-thread Ryzen 9 9900X reaches 5.6 GHz max boost with 64 MB L3 cache and native DDR5-5600 support. The motherboard supplies 14+2+1 80A DrMOS stages, an 8-layer PCB and dual 8-pin ProCool connectors for stable overclocking. Wi-Fi 6E, 2.5Gbps LAN, rear USB 20Gbps Type-C and front USB 10Gbps Type-C complete the I/O upgrade.

Highlights

  • Ready for demanding AI workloads with AM5 platform power and connectivity
  • 12 cores and 24 threads on Zen 5 architecture boost up to 5.6 GHz
  • Stable delivery from 14+2+1 80A DrMOS stages on 8-layer PCB
  • Fast storage via one PCIe 5.0 and two PCIe 4.0 M.2 slots with heatsink
  • Wi-Fi 6E, 2.5Gb LAN, USB 20Gbps and 10Gbps Type-C ports

Specifications

BrandASUS
ModelTUF GAMING B850M-PLUS WIFI+R9 9900X
CPU Socket TypeAM5
ChipsetAMD B850
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to 8000+MT/s (OC)
Maximum Memory Supported192GB
Channel SupportedDual Channel
ECC SupportedYes
Buffer SupportedUn-buffered
Memory FeatureDual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO)
ASUS Enhanced Memory Profile (AEMP)
PCI Express 5.0 x16AMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot (supports x16 mode)
PCI Express 4.0 x16AMD Ryzen 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
PCI Express x1AMD B850 Chipset
1 x PCIe 4.0 x1 slot
Serial ATA (SATA)4 x SATA 6Gb/s
M.2AMD 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 RAIDAMD 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 ChipsetRealtek ALC1220P
Audio 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
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 ax
BluetoothBluetooth 5.3
Back I/O Ports1 x USB 20Gbps port (1 x USB Type-C)
3 x USB 10Gbps ports (3 x Type-A)
4 x USB 5Gbps ports (4 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
1 x DisplayPort
1 x HDMI port
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet port
5 x Audio jacks
1 x BIOS FlashBack button
Onboard USB1 x USB 10Gbps connector (supports USB Type-C)
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 3 additional USB 2.0 ports
Other ConnectorsFan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
3 x 4-pin Chassis Fan headers
Miscellaneous
3 x Addressable Gen 2 headers
1 x Clear CMOS header
1 x Chassis Intrusion header
1 x COM Port header
1 x Front Panel Audio header (F_AUDIO)
1 x 10-1 pin Front System Panel header
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Power Pin1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connectors
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS
SoftwareASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Fan Xpert 4
- Power Saving
ASUS DriverHub
ASUS GlideX
TurboV Core
TUF GAMING CPU-Z
DTS Audio Processing
Norton 360 for Gamers (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkey
Windows 11Supported
FeaturesASUS TUF PROTECTION
- DIGI+ VRM (- Digital power design with DrMOS)
- ESD Guards
- TUF LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- M.2 Q-Latch
- PCIe Slot Q-Release
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
ASUS Thermal Solution
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- ProCool
- Pre-mounted I/O shield
- SafeDIMM
Aura Sync
- Addressable Gen 2 headers
Package Contents1 x AMD Ryzen 9 9900X CPU
1 x Shin-Etsu X-23-7868-2D (1.8g)
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x TUF GAMING sticker
2 x M.2 rubber packages
1 x Screw package for M.2 SSD
Documentation
1 x Quick start guide

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will my existing DDR5 memory kits work with the Ryzen 9 9900X and this B850 board?

The board has four 288-pin DDR5 slots supporting up to 192GB in dual-channel mode, with EXPO and AEMP profiles for speeds up to 8000+ MT/s.

How can I confirm the 14+2+1 80A DrMOS power stages are delivering stable power to the 12-core CPU after assembly?

Use the onboard Q-Dashboard and Q-LED indicators alongside Fan Xpert 4 to monitor VRM temperatures and power-phase activity in real time.

Which M.2 heatsinks and Wi-Fi antenna come pre-installed, and what must I source separately for the three M.2 slots?

A massive M.2 heatsink covers the PCIe 5.0 and one PCIe 4.0 slot; the Q-Antenna for Wi-Fi 6E is included. You only add the M.2 SSDs themselves.

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