ASUS ROG STRIX B850-A Gaming WIFI7 NEO ATX Motherboard DDR5 PCIe 5.0 AMD AM5

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

Chipset
AMD B850 Chipset
Memory
4 x DIMM slots, max. 256GB, DDR5

Supports up to
8400+MT/s(OC)**/8200+MT/s(OC)*** with Ryzen™ 9000 Series Processors,
9000+MT/s(OC)**/8600+MT/s(OC)*** with Ryzen™ 8000 Series Processors,
8000+MT/s(OC)**/8000+MT/s(OC)*** with Ryzen™ 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 HDMI™ port**
* Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
**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 (supports x16 mode)
AMD Ryzen™ 8700 & 8600 & 8400 Series Desktop Processors*
1 x PCIe 5.0 x16 slot (supports PCIe 4.0 x8 mode)
AMD Ryzen™ 8500 & 8300 Series Desktop Processors*
1 x PCIe 5.0 x16 slot (supports PCIe 4.0 x4 mode)
AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x4/x2 mode)

Storage
Total supports 4 x M.2 slots and 2 x SATA 6Gb/s ports
AMD Ryzen™ 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
AMD Ryzen™ 8700 & 8600 & 8400 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
AMD Ryzen™ 8500 & 8300 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x2 mode)
AMD B850 Chipset
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)*
M.2_4 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
2 x SATA 6Gb/s ports
* The M.2_3 slot shares bandwidth with the PCIEX16(G4) slot. When either the PCIEX16(G4) or M.2_3 slot is occupied, the slot runs at PCIe 4.0 x4 mode. When both slots are occupied, each runs at PCIe 4.0x2 mode. You can enter the BIOS to adjust the default settings as required.

RAID Support

AMD RAIDXpert2 Technology
Ryzen™ 9000 & 8000 & 7000 Series Processors: RAID 0/1/5/10
Ethernet

1 x Realtek® 5Gb Ethernet
ASUS LANGuard

Wireless & Bluetooth
Wi-Fi 7 (MediaTek MT7925)
2x2 Wi-Fi 7* (802.11be)
Supports 2.4/5/6GHz frequency band**
Supports Wi-Fi 7 160MHz bandwidth
Bluetooth® v5.4 (support LE Audio)***

USB
Rear USB (Total 12 ports)
4 x USB 10Gbps port(s) (2 x Type-A + 2 x USB Type-C®)
6 x USB 5Gbps port(s) (6 x Type-A)
2 x USB 2.0 port(s) (2 x Type-A)
Front USB (Total 11 ports)
1 x USB 20Gbps connector (1 x USB Type-C®)
2 x USB 5Gbps header(s) support(s) 4 additional USB 5Gbps ports
3 x USB 2.0 header(s) support(s) 6 additional USB 2.0 ports
USB Type-C® output (USB Type-C Current): 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
- Dedicated audio PCB layers
- Audio cover

Back Panel I/O Ports
4 x USB 10Gbps port(s) (2 x Type-A + 2 x USB Type-C®)
6 x USB 5Gbps port(s) (6 x Type-A)
2 x USB 2.0 port(s) (2 x Type-A)
1 x HDMI™ port
1 x Wi-Fi module
1 x Realtek® 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 20Gbps connector (supports USB Type-C® )
2 x USB 5Gbps headers support 4 additional USB 5Gbps ports
3 x USB 2.0 headers support 6 additional USB 2.0 ports

Miscellaneous
3 x Addressable RGB Gen 2 headers
1 x CPU Over voltage jumper
1 x Front Panel Audio header (F_AUDIO) 
1 x Start button
1 x 10-1 pin Front Panel System header
1 x Thunderbolt™ (USB4®) header 
Special Features
Asynchronous Clock
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
- 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
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Clear CMOS button
- ProCool
- Pre-mounted I/O shield
- SafeSlot
Aura Sync
- Addressable RGB Gen 2 headers
Software Features
ROG Exclusive Software
- ROG CPU-Z
- Dolby Atmos
ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Fan Xpert 4 (with AI Cooling II)
- GameFirst
- WiFi Q-Antenna
- MLO Wizard
ASUS DriverHub
- ASUS MB Manager
- ASUS AI Advisor
- AIDA64 Extreme (60 days free trial) 
- HWiNFO
- ASUS GlideX
- TurboV Core 
- Adobe Creative Cloud (Free Trial)**
- Norton 360 for Gamers (60 Days Free Trial)
- WinRAR (40 Days Free Trial)
UEFI BIOS
AI Overclocking Guide
AI Cache Boost
Integrated WiFi Driver Support
ASUS EZ DIY 
- ASUS CrashFree BIOS 3 
- ASUS EZ Flash
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkey

BIOS
64MB (512Mb) Flash ROM, UEFI AMI BIOS
Manageability
WOL by PME, PXE

Accessories
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
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
Operating System
Windows 11 (22H2 & later)
Form Factor
ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )