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ATX motherboard in matte black with silver heatsinks and yellow accents

ASUS

ASUS TUF GAMING B850-PLUS WIFI AMD AM5 B850 ATX motherboard

SKU CH-KD9Y-1ZJ3Q

Supports Ryzen 9000, 8000 and 7000 CPUs with 14+2+1 80A power stages, DDR5 up to 8000 MT/s, one PCIe 5.0 M.2 plus two PCIe 4.0 M.2 slots, Wi-Fi 7, 2.5Gb LAN and rear USB 20Gbps Type-C

  • CPU Socket TypeAM5
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to 8000+MT/s (OC)
  • Maximum Memory Supported192GB
  • Channel SupportedDual Channel
  • Stable CPU power from 14+2+1 80A DrMOS stages and 8-layer PCB
  • Fastest storage via one PCIe 5.0 M.2 slot plus two PCIe 4.0 M.2 slots with heatsinks
  • Wi-Fi 7 and 2.5Gb Ethernet plus rear USB 20Gbps Type-C and front USB 10Gbps Type-C
  • VRM, PCH and three M.2 heatsinks with hybrid fan headers and Fan Xpert 4
  • PCIe Slot Q-Release, M.2 Q-Latch, Q-Antenna, Q-Dashboard, Q-LED and BIOS FlashBack

Socket AM5 platform

The ASUS TUF GAMING B850-PLUS WIFI motherboard is built for AMD Ryzen 9000, 8000 and 7000 series processors. It supports up to 192GB of DDR5 memory across four 288-pin slots and runs dual-channel at speeds up to 8000+ MT/s with EXPO and AEMP profiles. A 14+2+1 80A DrMOS power stage array on an 8-layer PCB delivers stable current for high-core-count CPUs.

Thermals and power delivery

Enlarged VRM heatsinks, three M.2 heatsinks and a PCH heatsink form the core of the cooling solution. Hybrid fan headers connect to Fan Xpert 4 software for automated curve control. Dual 8+8 pin ProCool connectors feed the 80A power stages, keeping voltage steady under sustained multi-threaded workloads without excessive acoustic output.

DIY features and connectivity

PCIe Slot Q-Release and M.2 Q-Latch simplify GPU and SSD installation. Q-Dashboard and Q-LED give instant component-status feedback, while BIOS FlashBack updates firmware without a CPU. Rear I/O includes Wi-Fi 7, 2.5Gb Ethernet, USB 20Gbps Type-C, HDMI and DisplayPort. A front USB 10Gbps Type-C header and Thunderbolt (USB4) header are also provided.

Highlights

  • Stable CPU power from 14+2+1 80A DrMOS stages and 8-layer PCB
  • Fastest storage via one PCIe 5.0 M.2 slot plus two PCIe 4.0 M.2 slots with heatsinks
  • Wi-Fi 7 and 2.5Gb Ethernet plus rear USB 20Gbps Type-C and front USB 10Gbps Type-C
  • VRM, PCH and three M.2 heatsinks with hybrid fan headers and Fan Xpert 4
  • PCIe Slot Q-Release, M.2 Q-Latch, Q-Antenna, Q-Dashboard, Q-LED and BIOS FlashBack

Specifications

BrandASUS
ModelTUF GAMING B850-PLUS WIFI
Part Number90MB1J30-M0AAY0
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)**
AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)***
*** The PCIEX16(G4) shares bandwidth with M.2_3. The PCIEX16(G4) will be disabled when M.2_3 runs.
PCI Express x12 x PCIe 4.0 x1
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 2242/2260/2280/22110 (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 2242/2260/2280/22110 (supports PCIe 4.0 x4/x2 mode)**
AMD B850 Chipset
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)***
*** The PCIEX16(G4) shares bandwidth with M.2_3. The PCIEX16(G4) will be disabled when M.2_3 runs.
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 be
BluetoothBluetooth 5.4
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)
2 x USB 2.0 ports (2 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 4 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
4 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
1 x Thunderbolt (USB4) header
Form FactorATX
Dimensions (W x L)12.0" 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 ContentsCables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x TUF GAMING sticker
2 x M.2 rubber packages
Documentation
1 x Quick start guide

Questions about this item

How do I install the CPU cooler so the AM5 socket back-plate stays aligned?

The pre-mounted I/O shield keeps the board steady while you seat the processor; tighten the cooler in a cross pattern so the 14+2+1 80A VRM heatsink contacts evenly.

Which onboard component will need attention after prolonged operation?

The three M.2 heatsinks and enlarged VRM heatsink rely on case airflow; clean dust from their fins periodically to maintain thermal performance.

What limit appears first when the 14+2+1 80A power stages run sustained heavy loads?

VRM temperature rises until the Fan Xpert 4 curves ramp the hybrid fan headers; adequate case flow prevents throttling.

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