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Overview

Range/Series Overview


IMPORTANT: This Range/Series overview section describes the range of which this product belongs. Features of different versions might be mentioned and may not apply to the specific product on this page. Please view Specs for specification of product.

The ASUS PRIME B850M-A WIFI motherboard is designed to deliver performance for the modern user. Featuring support for AMD Ryzen processors, this micro ATX motherboard includes multiple expansion slots such as PCIe 5.0 x16 and PCIe 4.0 x16, ensuring connectivity for high-performance components. The motherboard supports DDR5 SDRAM with speeds reaching up to 4000 MHz, allowing for efficient multitasking and improved system responsiveness.

Utilizing features like AMD RAID Xpert2 Technology, the PRIME B850M-A enables optimized storage options to ensure data integrity and security. The integrated high definition audio support delivers a sound experience, while a well-designed power management system, composed of an 8+2+1 Phase Power Design and heat dissipation mechanisms, ensures stability during high-demand scenarios. With built-in Wi-Fi 6E and 2.5 Gigabit Ethernet, this motherboard ensures high-speed connectivity for online gaming and streaming, providing a foundation for building a powerful system.


Features Summary

  • Robust audio capabilities
    Equipped with high definition audio support, the motherboard provides 8-channel audio output for a sound experience, ideal for gaming and multimedia applications.
  • Versatile storage options
    The ASUS PRIME B850M-A is designed with 4 x SATA-600 (RAID) and 3 x M.2 sockets to accommodate multiple storage devices, enhancing system performance and data management.
  • Extensive connectivity
    This motherboard provides a range of connectivity ports, including USB 3.2 Gen 2, HDMI, DisplayPort, and 2.5 Gigabit Ethernet, ensuring compatibility with various peripherals and high-speed networks.
  • Customizable bios features
    Features such as ASUS EZ Flash 3 and CrashFree BIOS 3 allow for easy system management and recovery, providing users with an experience while maintaining optimal performance.
  • Enhanced thermal management
    The motherboard includes a VRM heatsink design, chipset heatsink, and a dedicated M.2 heatsink, ensuring cooling under heavy workloads for sustained performance.

Specification Summary

Product Description
ASUS PRIME B850M-A WIFI - motherboard - micro ATX - Socket AM5 - AMD B850
Product Type
Motherboard - micro ATX
Chipset Type
AMD B850
Processor Socket
1 x Socket AM5
Compatible Processors
Ryzen (supports Ryzen 7000/8000/9000 Series)
Max RAM Size
256 GB
RAM Supported
4 DIMM slots - DDR5, on-die ECC, non-ECC, ECC, unbuffered
Storage Ports
4 x SATA-600 (RAID), 3 x M.2
USB / FireWire Ports
2 x USB 3.2 Gen 2 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 USB 2.0 via headers)
Audio
HD Audio (8-channel)
LAN
802.11a/b/g/n/ac/ax (Wi-Fi 6E), Bluetooth 5.3, 2.5 Gigabit Ethernet

Specifications

EAN / GTIN:
4711636051125
General
Product Type
Motherboard - micro ATX
Chipset Type
AMD B850
Processor Socket
Socket AM5
Max Processors Qty
1
Compatible Processors
Ryzen (supports Ryzen 7000/8000/9000 Series)
Supported RAM
Max Size
256 GB
Technology
DDR5
Bus Clock
4000 MHz (O.C.)
Supported RAM Integrity Check
On-die ECC, non-ECC, ECC
Registered or Buffered
Unbuffered
Features
Dual channel memory architecture, AMD EXPO technology
Audio
Type
HD Audio (8-channel)
Compliant Standards
High Definition Audio
LAN
Network Interfaces
802.11a/b/g/n/ac/ax (Wi-Fi 6E), Bluetooth 5.3, 2.5 Gigabit Ethernet
Expansion / Connectivity
Expansion Slots
1 x CPU ¦ 4 x DIMM 288-pin ¦ 1 x PCIe 5.0 x16 ¦ 1 x PCIe 4.0 x16 ¦ 2 x M.2 socket (2280 M.2 Key M slot) ¦ 1 x M.2 socket (2230/2242/2260/2280 M.2 Key M slot)
Storage Interfaces
SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 / RAID 5 ¦ PCIe 5.0 -connectors: 1 x M.2 ¦ PCIe 4.0 -connectors: 2 x M.2
RAID Features
AMD RAID Xpert2 Technology
Interfaces
1 x LAN (2.5Gigabit Ethernet) ¦ 1 x HDMI ¦ 1 x DisplayPort ¦ 2 x USB 3.2 Gen 2 ¦ 2 x USB 3.2 Gen 1 ¦ 4 x USB 2.0 ¦ 1 x audio line-out - mini-jack ¦ 1 x audio line-in - mini-jack ¦ 1 x audio line-out (rear) - mini-jack ¦ 2 x aerial
Internal Interfaces
1 x USB-C 3.2 Gen 1 - header ¦ 2 x USB 3.2 Gen 1 - header ¦ 4 x USB 2.0 - header ¦ 1 x SPDIF out - header ¦ 1 x SPI - header ¦ 1 x audio - header ¦ 1 x serial - header
Power Connectors
24-pin main power connector, 8-pin ATX12V connector, 4-pin ATX12V connector
Features
BIOS Type
AMI
BIOS Features
UEFI BIOS, ASUS EZ Flash 3, ASUS UEFI BIOS EZ Mode
Sleep / Wake Up
Wake on LAN (WOL), wake on PME
Hardware Features
ASUS Enhanced Memory Profile (AEMP), CrashFree BIOS 3, Preboot eXecution Environment (PXE), ASUS Aura Sync, TUF LANGuard, ASUS DIGI+ VRM, ASUS EZ DIY, ASUS Overvoltage Protection, ASUS ProCool, ASUS Q-Design, ASUS SafeDIMM, ASUS SafeSlot, ASUS Stainless Steel Back I/O, ASUS TUF Protection, BIOS FlashBack button, BIOS FlashBack LED, M.2 heatsink, M.2 Q-Latch, PCIe Slot Q-Release, pre-mounted I/O shield, Q-Antenna, Q-Dashboard, Q-DIMM, Q-LED, VRM heatsink design, 8+2+1 Phase Power Design, DIY Friendly Design, chipset heatsink, 8 Layer PCB, TUF 5K black metallic capacitors, PCH heatsink
Miscellaneous
Included Accessories
ASUS Wi-Fi Q-antenna, 1 x M.2 rubber package, 2 x M.2 screw package
Cables Included
2 x Serial ATA cable
Software Included
Adobe Creative Cloud (free trial), Armoury Crate, ASUS AURA Creator, ASUS DriverHub, ASUS Fan Xpert 4, ASUS GlideX, ASUS TUF GAMING CPU-Z, Norton 360 for Gamers (60 days trial), TurboV Core, WinRAR (40 days trial), DTS Audio Processing
Width
24.4 cm
Depth
24.4 cm

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