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Main image of 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

Alt view image 2 of 8 - 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

Alt view image 3 of 8 - 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

Alt view image 4 of 8 - 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

Alt view image 5 of 8 - 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

Alt view image 6 of 8 - 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

Alt view image 7 of 8 - 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

Alt view image 8 of 8 - 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

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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

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Option: ROG STRIX B850-A GAMING WIFI

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ROG Strix B850-F GAMING WIFI7 NEO

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

Overview

Specs

Reviews (21)

ROG STRIX B850-A GAMING WIFI

Best Seller Ranking	#30 in AMD Motherboards

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
First Listed on Newegg	January 22, 2025

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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

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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

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