Asus ROG STRIX B850-A Gaming WIFI DDR5 AMD Motherboard

Key Features

ROG STRIX B850-A gaming wifi

Elevate your build with the ROG Strix B850-A Gaming WiFi. Featuring a sleek white PCB and support for AMD Ryzen™ 9000 Series processors, this motherboard delivers the power and connectivity needed for advanced AI applications. With DDR5 support, full PCIe 5.0 capabilities, USB 20Gbps port, and WiFi 7, it's the ultimate blend of style and performance.

ASUS AI ADVISOR

Using AI technology to understand natural-language questions or scenario descriptions, ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.

AI NETWORKING II

AI Networking II combines intelligent technologies to continuously optimize network performance, provide trustworthy and seamless connectivity, and unleash the full speed of WiFi 7.

PBO ENHANCEMENT

AMD Precision Boost Overdrive (PBO) pushes the CPU current and voltage budget to opportunistically increase performance. By aggressively tuning the PBO parameters, AMD's algorithm can leverage the motherboard's robust power solution to ramp up performance even higher.

DDR5 DOMINATION

The Strix B850-A is primed and ready for enthusiast-grade kits courtesy of vast AMD Extended Profiles for Overclocking (EXPO) support.

AEMP

ASUS Enhanced Memory Profile (AEMP) is an exclusive firmware feature for PMIC-restricted memory modules.

pcie 5.0

Fully embracing the new standard, the Strix B850-A offers end-to-end PCIe 5.0 support.

UNDENIABLY ROG STRIX

The ROG Strix B850-A stands out with its striking white PCB, offering a fresh and modern aesthetic that seamlessly complements almost any system build. The matching metallic heatsinks enhance its clean, crisp look, while subtle RGB lighting on the I/O shroud allows you to either maintain a sleek, understated appearance or showcase a bold, luminous design.

OUTSHINE THE COMPETITION

ROG Strix motherboards feature ASUS Aura technology, enabling full lighting control and a variety of presets for both onboard RGB LEDs and third-party accessories. Effects can be easily synced across compatible ROG graphics cards, monitors, keyboards, and mice to give your setup a unified look.

BUILD FOR THE MOST ADVANCED PC FOR GAMING AND CREATING

When only the fastest will do, a Strix B850 motherboard delivers. With USB 20Gbps onboard along with robust overclocking¹ capabilities, featuring faster dual-channel DDR5 memory support, AMD EXPO™ technology and PCIe® 5.0 support for both graphics and NVMe, you can play the most demanding games and deliver your biggest projects with the revolutionary performance of an AMD 800-series motherboard and AMD Ryzen™ 9000, 8000, and 7000 Series processors.

Specification

Model : ROG STRIX B850-A GAMING WIFI

CPU : AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors

Chipset : AMD B850 Chipset

BIOS : 256 Mb Flash ROM, UEFI AMI BIOS

Manageability : WOL by PME, PXE

Operating System : Windows 11

Memory

4 x DIMM slots, max. 256GB, DDR5

Supports up to 8000+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors

 ECC and Non-ECC, Un-buffered DIMM

Dual channel memory architecture

Supports AMD Extended Profiles for Overclocking (EXPO™)

ASUS Enhanced Memory Profile (AEMP)

Graphics

1 x DisplayPort

1 x HDMI™ port

- Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.

Supports max. 8K@30Hz as specified in DisplayPort 1.4

Supports 4K@60Hz as specified in HDMI 2.1

VGA resolution support depends on processors' or graphic cards' resolution.

Expansion Slots

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)*

AMD B850 Chipset

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

- To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

Storage

Total supports 4 x M.2 slots and 2 x SATA 6Gb/s ports

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)

2 x SATA 6Gb/s ports

Specifications vary by CPU types.

M.2_3 slot shares bandwidth with PCIEX16(G4). When PCIEX16(G4) slot is operating, M.2_3 will be disabled.

AMD RAIDXpert2 Technology

Ryzen™ 9000 Series Processors: RAID 0/1/5/10

Ryzen™ 8000 Series Processors: RAID 0/1

Ryzen™ 7000 Series Processors: RAID 0/1/10

Ethernet

1 x Intel® 2.5Gb Ethernet

ASUS LANGuard

Wireless & Bluetooth

Wi-Fi 7

2x2 Wi-Fi 7 (802.11be)

Supports 2.4/5/6GHz frequency band**

Supports Wi-Fi 7 160MHz bandwidth, up to 2.9Gbps transfer rate.

Bluetooth® v5.4

Wi-Fi features may vary depending on the operating system

For Windows 11, Wi-Fi 7 will require 24H2 or later version for full functions, Windows 11 21H2/22H2/23H2 only supports Wi-Fi 6E.

For Windows 10, only Wi-Fi 6 is supported.

Wi-Fi 6GHz frequency band and bandwidth regulatory may vary between countries.

The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.

USB

Rear USB (Total 10 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)

Front USB (Total 7 ports)

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

USB Type-C® power delivery output: max. 5V/3A

Audio

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

A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. 

The LINE OUT port on the rear panel does not support spatial audio. If you wish to use spatial audio, make sure to connect your audio output device to the audio jack on the front panel of your chassis or use a USB interface audio device.

Back Panel 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

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

Power Related 

1 x 24-pin Main Power connector

2 x 8-pin +12V CPU Power connector

Storage Related 

4 x M.2 slots (Key M) 

2 x SATA 6Gb/s ports

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

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

Special 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

Software Features

ROG Exclusive Software

- ROG CPU-Z

- Dolby Atmos

ASUS Exclusive Software

Armoury Crate

- AIDA64 Extreme (60 days free trial) 

- Aura Creator

- Aura Sync

- Fan Xpert 4

- GameFirst

- HWiNFO

- Power Saving

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

Accessories

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

Form Factor

ATX Form Factor 

12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )