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ASUS ROG STRIX B850-A GAMING WIFI AMD AM5 B850 ATX motherboard 14+2+2 power stages, DDR5 AEMP, 2.5G LAN, WiFi 7 with Q-Antenna, 4x M.2, PCIe 5.0, USB 20Gbps Type-C, AI Networking II, ASUS AI Advisor

  • ROG STRIX B850-F GAMING WIFI
  • ROG STRIX B850-A GAMING WIFI
  • ROG STRIX B850-I GAMING WIFI
  • TUF GAMING B850-PLUS WIFI
  • TUF GAMING B850M-PLUS WIFI
  • PRIME B840-PLUS WIFI
  • PRIME B840M-A WIFI-CSM
  • Ready for Advanced AI PCs: Designed for the future of AI computing, with the power and connectivity needed for demanding AI applications
  • AMD AM5 Socket: Ready for AMD Ryzen 9000, 8000 and 7000 series desktop processors
  • Intelligent Control: ASUS AI Advisor, AI Networking II and AEMP to simplify setup and improve performance
  • Robust Power Solution: 14+2+2 power solution rated for 80A per stage with an 8+8-pin ProCool power connector, high-quality alloy chokes, and durable capacitors to support multi-core processors
  • Optimized Thermal Design: Massive heatsinks bridged to the VRMs with high-conductivity thermal pads and an integrated I/O cover
  • Latest M.2 Support: One onboard PCIe 5.0 M.2 slot and three PCIe 4.0 M.2 slots, all with substantial cooling solutions
  • Abundant Connectivity: USB 20Gbps Type-C, USB 10Gbps Type-C, USB 10Gbps Type-C front-panel connector, six additional USB 5Gbps ports, PCIe 5.0 x16 SafeSlots, HDMI port and DisplayPort port
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Specs
Reviews (12)

Learn more about the ASUS ROG STRIX B850-A GAMING WIFI

Model
Brand ASUS
Model ROG STRIX B850-A GAMING WIFI
Part Number 90MB1J50-M0AAY0
Supported CPU
CPU Socket Type AM5
CPU Type Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
Chipsets
Chipset AMD B850
Memory
Number of Memory Slots 4x288pin (DDR5)
Memory Standard Up to DDR5 8000+MT/s (OC)
Maximum Memory Supported 192GB
Channel Supported Dual Channel
ECC Supported Yes
Buffer Supported Un-buffered
Memory Feature Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO)
ASUS Enhanced Memory Profile (AEMP)
Expansion Slots
PCI Express 5.0 x16 AMD Ryzen 9000 & 7000 Series Desktop Processors
- 1 x PCIe 5.0 x16 slot with Q-Release Slim
AMD Ryzen 8000 Series Desktop Processors
- 1 x PCIe 5.0 x16 slot with Q-Rlease Slim (supports PCIe 4.0 x8 or x4 mode)*
PCI Express 4.0 x16 1 x PCIe 4.0 x16 slot (supports x4 mode)**
* Specifications vary by CPU types.
** PCIEX16(G4) slot (supports x4 mode) from AMD B850 Chipset shares bandwidth with M.2_3
Storage Devices
Serial ATA (SATA) 2 x SATA 6Gb/s
M.2 AMD Ryzen 7000 & 9000 Series Desktop Processors
M.2_1 (Key M), type 2242/2260/2280 (supports PCIe 5.0x4 mode)
M.2_2 (Key M), type 2280/22110 (supports PCIe 4.0 x4 mode)
AMD Ryzen 8000 Series Desktop Processors
M.2_1 (Key M), type 2242/2260/2280 (supports PCIe 4.0x4 mode)
M.2_2 (Key M), type 2280/22110 (supports PCIe 4.0 x4/x2 mode)*

AMD B850 Chipset
M.2_3 (Key M), type 2280 (supports PCIe 4.0 x4)**
M.2_4 (Key M), type 2280 (supports PCIe 4.0 x4)

** M.2_3 slot shares bandwidth with PCIEX16(G4). When PCIEX16(G4) slot is operating, M.2_3 will be disabled.
SATA RAID 0/1/5/10
Onboard Audio
Audio Chipset Realtek ALC4080
Audio Channels ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
- Impedance sense for front and rear headphone outputs
- Supports: Jack-detection, Multi-streaming, Front Panel MIC Jack-retasking
- High quality 120 dB SNR stereo playback output and 110 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback on front panel
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP
- Rear optical S/PDIF out port
- Premium audio capacitors
- Audio cover
Onboard LAN
Max LAN Speed 2.5Gbps
Wireless LAN Wi-Fi 802.11 be
Bluetooth Bluetooth 5.4
Rear Panel Ports
Back I/O Ports 1 x USB 20Gbps port (1 x USB Type-C)
3 x USB 10Gbps ports (2 x Type-A + 1 x USB Type-C)
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 Intel 2.5Gb Ethernet port
2 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
1 x Clear CMOS button
Internal I/O Connectors
Onboard USB 1 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 Connectors Fan 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 CPU Over voltage jumper
1 x Front Panel Audio header (F_AUDIO)
1 x Power button
1 x 10-1 pin Front System Panel header
1 x Thermal Sensor header
1 x Thunderbolt (USB4) header
Physical Spec
Form Factor ATX
Dimensions (W x L) 12.0" x 9.6"
Power Pin 1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connector
Software Feature
BIOS Feature 256 Mb Flash ROM, UEFI AMI BIOS
Software ROG Exclusive Software
- ROG CPU-Z
- Dolby Atmos
ASUS Exclusive Software
Armoury Crate
- AIDA64 Extreme (60 days free trial)
- Aura Creator
- Aura Sync
- GameFirst
- HWiNFO
- Power Saving
- Fan Xpert 4
ASUS DriverHub
ASUS GlideX
TurboV Core
Adobe Creative Cloud (Free Trial)
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 11 Supported
Features
Features Extreme Engine Digi+
- 5K Black metallic capacitors
ASUS Q-Design
- M.2 Q-Latch
- M.2 Q-Release
- M.2 Q-Slide
- PCIe Slot Q-Release Slim (with PCIe SafeSlot)
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink backplate
- M.2 heatsink
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- Clear CMOS button
- ProCool
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Aura Sync
- Addressable Gen 2 headers
Packaging
Package Contents Cables
2 x SATA 6Gb/s cables

Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x Cable ties package
1 x M.2 Q-Latch package
1 x M.2 Q-Slide package
1 x ROG key chain
1 x ROG Strix stickers
4 x M.2 rubbers

Documentation
1 x Quick start guide
Additional Information
Date First Available January 06, 2025

Warranty & Returns

Warranty, Returns, And Additional Information

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