ROG STRIX B850-A GAMING WIFI (DDR5)

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

* Refer to https://www.asus.com/support/download-center/ for CPU support list.

AMD

AM5

AMD B850

4 x DIMM slots, max. 192GB, 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)

* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/.
** Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

8000

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.

N/A

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.

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/x4 mode)**

AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)*

* PCIEX16(G4) slot (supports x4 mode) from AMD B850 Chipset shares bandwidth with M.2_3
** Specifications vary by CPU types.

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

PCIe 5.0

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

* AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1. RAID 5 Function is only supported by AMD Ryzen™ 9000 series CPU. 
** 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.

NVMe

4

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

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

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 (4 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 

1 x Intel® 2.5Gb Ethernet
ASUS LANGuard

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.

ATX

N/A

256 Mb Flash ROM, UEFI AMI BIOS

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

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
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
FlexKey

Windows 11

2 x SATA 6Gb/s cables 
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
1 x USB drive with utilities and drivers 
1 x Quick start guide

Form Factor

ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )