Asus Prime B850m-A Wifi Amd B850 Am5 Micro Atx 4 Ddr5 Hdmi 2 Dp Wi-Fi 6E 2.5G La 90MB1LN0-M0EAY0

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors.
 
The PRIME B850M-A WIFI motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.  


AMD B850 (AM5 Socket) micro-ATX motherboard
Advanced AI PC-ready
DDR5
PCIe 5.0 Ready
Three M.2 slots
Wi-Fi 6E
Realtek 2.5Gb Ethernet
Dual DisplayPort
HDMI
Front USB 5Gbps Type-C® support
BIOS FlashBack
Aura Sync
 

   
Performance

AI Advisor - ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.
Digital Power Design - PRIME B850M-A WIFI features an 8+2+1 phase power design with discrete MOSFETs, ensuring efficient and stable power delivery for AMD processors plus steady performance for day-to-day use.

Six-layer PCB design - The multi-layered printed circuit board design quickly dissipates heat around the voltage regulators to improve overall system stability and provide the CPU with more overclocking headroom.

Digi+ VRM control - The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings.
 

Enhanced Memory & Storage Performance


Enhanced DDR5 performance - Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B850M-A WIFI maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits. For entry-level modules without EXPO™ support, ASUS Enhanced Memory Profile (AEMP) automatically detects memory chips and provides optimized profiles for enhanced performance. For those looking to surpass stock DDR5 speeds, the PRIME B850M-A WIFI offers extensive AMD Extended Profiles for Overclocking (EXPO™) support and a wide array of UEFI settings for further performance tweaks.

Three M.2 slots (up to 128 Gbps) - PRIME B850M-A WIFI offers a total of three M.2 slots, including one that supports data-transfer speeds of up to 128 Gbps via PCIe 5.0, and two that support PCIe 4.0. This enables quicker boot-up and app load times with OS or application drives.
 
 
 
 

Cooler by design
 

The PRIME B850M-A WIFI motherboard is engineered with multiple onboard heatsinks and an array of hybrid fan headers to help ensure your rig stays cool and stable under intense workloads.

ASUS Fan Xpert 2+ - ASUS Fan Xpert 2+ software provides comprehensive control over fans. An Auto-Tuning mode intelligently configures all parameters with a single click. There’s also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.
 
Empowering connections
 
This motherboard offers a versatile range of connectivity, including support for PCIe 5.0 slot and an arsenal of USB ports which includes Type-C® connections.

WiFi 6E - Built-in WiFi 6E5 technology takes advantage of the newly available radio spectrum in the 6 GHz band. With triple the bandwidth of the 2.4/5/6 GHz band, WiFi 6E delivers ultrafast wireless networking speeds with improved capacity and better performance in dense wireless environments.
Realtek 2.5Gb Ethernet - Realtek 2.5 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.

Front USB 5Gbps Type-C® - This motherboard features a USB 5Gbps Type-C® front panel connector for speedy data transfers of up to 5Gbps.
 
 
Personalization

The PRIME B850M-A WIFI enhances the user experience across the board, from simplifying BIOS setting adjustments to offering customizable RGB lighting controls for a uniquely personal system aesthetic.

UEFI BIOS - The UEFI interface delivers easy-to-use configuration options for PC beginners, and advanced features for veterans.
ASUS DriverHub - Simplify driver management with automatic detection, one-click installation and update for smooth, efficient system performance.
Armoury Crate - Customize Aura Sync RGB and control ASUS devices. Includes product registration and updates.
Aura Sync - Complete RGB lighting control for enthusiast systems, ensuring seamless synchronization with compatible hardware.
Addressable Gen2 RGB headers - Three addressable Gen 2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.
 
 
 
 
 
DIY friendly

The PRIME B850M-A WIFI motherboard features EZ PC DIY innovations that simplify and speed up the PC building process, making DIY easy and convenient.

BIOS FlashBack - BIOS FlashBack™ simplifies BIOS updates. Just load the BIOS file onto a FAT32 USB stick, insert it into the BIOS FlashBack™ port, and press a button—no CPU or memory needed.
SafeSlot - PCIe 5.0 is twice as fast as PCIe 4.0. ASUS has adapted our SMT manufacturing for the faster SafeSlot, a reinforced metal sheath that ensures secure card installation and faster data speeds.
Q-LED Core - The Q-LED Core display produces color-coded lights during the Power-On Self-Test (POST) that can help you troubleshoot potential issues.
 

DescriptionSpecification

Motherboard Type: Desktop
Form Factor: Micro ATX
Socket: AMD AM5
Chipset: AMD B850
#Hide#DDR Type: DDR5
CPU Support: Click here for CPU support
RAM Technology: "DDR5 (Dual Channel)
ECC and Non-ECC Un-buffered DIMM*
Supports AMD EXPO
ASUS AEMP

*Non-ECC, un-buffered DDR5 memory supports On-Die ECC function"
RAM Slots: 4 x DIMM
RAM Speeds: Up to 8000+MT/s (OC)
Maximum Memory: 256GB
Graphics: Integrated Graphics
Graphics specifications may vary between CPU types
Graphics Ports: 1 x HDMI
2 x DisplayPort
PCI/PCI Express: Ryzen 9000 & 7000 Series CPUs:
1 x PCIe 5.0 x16 (supports x16 mode)

Ryzen 8000 Series CPUs:
1 x PCIe 4.0 x16 (supports x8/x4 mode)

AMD B850 Chipset:
1 x PCIe 4.0 x16 (support x4 mode)
Storage: 4 x SATA III
3 x M.2

Ryzen 9000 & 7000 Series CPUs:
M.2_1 (2280) - PCIe 5.0 x4
M.2_2 (2280) - PCIe 4.0 x4

Ryzen 8000 Series CPUs:
M.2_1 (2280) - PCIe 4.0 x4
M.2_2 (2280) - PCIe 4.0 x4/x2

AMD B850 Chipset:
M.2_3 (2242/2260/2280) - PCIe 4.0 x4
RAID: Ryzen 9000 Series CPUs: RAID 0/1/5/10
Ryzen 8000 Series CPUs: RAID 0/1
Ryzen 7000 Series CPUs: RAID 0/1/10
Wireless: Wi-Fi 6E
2x2 Wi-Fi 6E (802.11ax)
Supports 2.4/5/6GHz frequency band
Bluetooth v5.3
LAN: 2.5GB LAN
Audio: Realtek 7.1 Surround Sound High Definition Audio CODEC
USB Ports Supported: Rear:
2 x USB 10Gbps Type-A
2 x USB 5Gbps Type-A
4 x USB 2.0

Front:
1 x USB 5Gbps Type-C
2 x USB 5Gbps
4 x USB 2.0
Back Panel I/O Ports: 2 x USB 10Gbps Type-A
2 x USB 5Gbps Type-A
4 x USB 2.0
2 x DisplayPort
1 x HDMI
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet
3 x Audio jacks
1 x BIOS FlashBack button
Internal I/O Connectors: 1 x 4-pin CPU Fan
1 x 4-pin CPU OPT Fan
1 x 4-pin AIO Pump
3 x 4-pin Chassis Fan
1 x 24-pin Main
1 x 8-pin +12V CPU
1 x 4-pin +12V CPU
3 x M.2 (Key M)
4 x SATA 6Gb/s
1 x USB 5Gbps Type-C
1 x USB 5Gbps
.: 2 x USB 2.0
3 x Addressable RGB Gen2
1 x Clear CMOS
1 x Chassis Intrusion
1 x COM Port
1 x Front Panel Audio
1 x S/PDIF Out
1 x SPI TPM (14-1 pin)
1 x 10-1 pin System Panel
Accessories: 2 x SATA 6Gb/s cables
1 x ASUS WiFi Q-Antenna
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
1 x Quick start guide
Additional Features: See Overview
Package Type: Retail
Package Weight: 1.5200 kg
Warranty: 3 Years
#Hide#M.2 Slot(s): Yes (M.2)
#Hide#No. LAN Ports: 1 x LAN
#Hide#Max LAN Speed: 2.5GB LAN
#Hide#Wi-Fi: Yes (Wi-Fi)