ASUS ROG STRIX B850-A GAMING WIFI ATX Motherboard

Model & CPU Compatibility

Model: ROG STRIX B850-A GAMING WIFI
CPU Support: AMD Socket AM5 for AMD Ryzen™ 9000, 8000 & 7000 Series Desktop Processors*
Refer to ASUS support for the full CPU support list

Chipset

AMD B850 Chipset

Memory

4 x DIMM slots, max. 256GB, DDR5
Supports up to 8000+ MT/s (OC) with Ryzen™ 9000/8000/7000 Series
ECC and Non-ECC, Un-buffered DIMM
Dual channel architecture
Supports AMD Extended Profiles for Overclocking (EXPO™) and ASUS Enhanced Memory Profile (AEMP)

Graphics Outputs

1 x DisplayPort* (Supports max. 8K@30Hz as per DP 1.4)
1 x HDMI™ port** (Supports 4K@60Hz as per HDMI 2.1)
*VGA resolution support depends on processor/graphics card

Expansion Slots

- For AMD Ryzen™ 9000 & 7000 Series: 1 x PCIe 5.0 x16 slot with Q-Release Slim
- For AMD Ryzen™ 8000 Series: 1 x PCIe 5.0 x16 slot with Q-Release 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 type
**M.2_3 slot shares bandwidth with PCIEX16(G4); when the slot is in use, M.2_3 will be disabled

Storage

Total: 4 x M.2 slots and 2 x SATA 6Gb/s ports
For Ryzen™ 7000 & 9000 Series:
• M.2_1 (Key M), type 2242/2260/2280 (PCIe 5.0 x4 mode)
• M.2_2 (Key M), type 2280/22110 (PCIe 4.0 x4 mode)
For Ryzen™ 8000 Series:
• M.2_1 (Key M), type 2242/2260/2280 (PCIe 4.0 x4 mode)
• M.2_2 (Key M), type 2280/22110 (PCIe 4.0 x4/x2 mode)*
From AMD B850 Chipset:
• M.2_3 (Key M), type 2280 (PCIe 4.0 x4)**
• M.2_4 (Key M), type 2280 (PCIe 4.0 x4)
Plus: 2 x SATA 6Gb/s ports
*Specifications vary by CPU type
**M.2_3 shares bandwidth with PCIEX16(G4) slot

RAID Support

AMD RAIDXpert2 Technology:
- Ryzen™ 9000: RAID 0/1/5/10
- Ryzen™ 8000: RAID 0/1
- Ryzen™ 7000: RAID 0/1/10

Ethernet

1 x Intel® 2.5Gb Ethernet with ASUS LANGuard

Wireless & Bluetooth

Wi‑Fi: 2×2 Wi‑Fi 7 (802.11be); supports 2.4/5/6GHz (note: features vary by OS; full functions on Windows 11 24H2+)
Supports Wi‑Fi 7 160MHz bandwidth, up to 2.9Gbps
Bluetooth: v5.4 (version may vary)

Rear USB Ports

Total 10 ports:
• 1 x USB 20Gbps (Type‑C)
• 3 x USB 10Gbps (2 x Type‑A + 1 x USB Type‑C)
• 4 x USB 5Gbps (Type‑A)
• 2 x USB 2.0 (Type‑A)

Front USB Connectivity

Total 7 ports:
• 1 x USB 10Gbps connector (supports USB Type‑C; up to 5V/3A PD output)
• 1 x USB 5Gbps header (supports 2 additional ports)
• 2 x USB 2.0 headers (support 4 additional ports)

Audio

ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
• Features: Impedance sense for front/rear headphone outputs, jack-detection, multi-streaming, front panel MIC jack-retasking
• High quality: 120 dB SNR stereo playback, 110 dB SNR recording
• Supports up to 32-Bit/384 kHz playback on front panel
*(Requires chassis with HD audio module for full 7.1 support; note rear LINE OUT does not support spatial audio)

Back Panel I/O

• 1 x USB 20Gbps (USB Type‑C)
• 3 x USB 10Gbps (2 x Type‑A + 1 x USB Type‑C)
• 4 x USB 5Gbps (Type‑A)
• 2 x USB 2.0 (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
• 1 x BIOS FlashBack™ button
• 1 x Clear CMOS button

Internal I/O Connectors

Fan & Cooling:
• 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:
• 1 x 24-pin Main Power connector
• 2 x 8-pin +12V CPU Power connectors
Storage:
• 4 x M.2 slots
• 2 x SATA 6Gb/s ports
USB:
• 1 x USB 10Gbps connector (Type‑C)
• 1 x USB 5Gbps header (supports 2 ports)
• 2 x USB 2.0 headers (supports 4 ports)
Miscellaneous:
• 3 x Addressable Gen 2 headers, CPU overvoltage jumper, front panel audio header, power button, front system panel header, thermal sensor, Thunderbolt™ (USB4®) header

Special Features

ASUS Q‑Design: M.2 Q‑Latch, Q‑Release, Q‑Slide; PCIe Slot Q‑Release Slim with SafeSlot; Q‑Antenna; Q‑Dashboard; Q‑DIMM; Q‑LED indicators; Q‑Slot
ASUS Thermal Solution: M.2 heatsink backplate & heatsink
ASUS EZ DIY: BIOS FlashBack™ button & LED, Clear CMOS button, ProCool, Pre‑mounted I/O shield, SafeDIMM
Aura Sync: Addressable Gen 2 headers for customizable lighting

Software & BIOS

Software:
• ROG Exclusive Software: ROG CPU‑Z, Dolby Atmos
• ASUS Exclusive Software: Armoury Crate, AIDA64 Extreme (trial), Aura Creator, Aura Sync, Fan Xpert 4, GameFirst, HWiNFO, Power Saving, ASUS DriverHub, ASUS GlideX, TurboV Core, Adobe Creative Cloud (trial), Norton 360 for Gamers (trial), WinRAR (trial)
UEFI BIOS: ASUS EZ DIY (CrashFree BIOS 3, EZ Flash 3, UEFI BIOS EZ Mode, ASUS MyHotkey); 256 Mb Flash ROM, UEFI AMI BIOS
Manageability: WOL by PME, PXE

Accessories

• 2 x SATA 6Gb/s cables
• ASUS WiFi Q‑Antenna
• Cable ties package
• M.2 Q‑Latch & Q‑Slide packages
• ROG key chain
• ROG Strix stickers
• 4 x M.2 rubbers
• Quick start guide

Operating System

Windows 11

Form Factor & Dimensions

ATX Form Factor
Dimensions: 12″ x 9.6″ (30.5 cm x 24.4 cm)