% £-170.37
Asus PRIME B850M-A-CSM - Corporate Stable Model, AMD B850, AM5, Micro ATX, 4 DDR5, HDMI, 2 DP, 2.5G LAN, 3x M.2
Asus PRIME B850M-A-CSM - Corporate Stable Model, AMD B850, AM5, Micro ATX, 4 DDR5, HDMI, 2 DP, 2.5G LAN, 3x M.2
Asus PRIME B850M-A-CSM - Corporate Stable Model, AMD B850, AM5, Micro ATX, 4 DDR5, HDMI, 2 DP, 2.5G LAN, 3x M.2
Asus PRIME B850M-A-CSM - Corporate Stable Model, AMD B850, AM5, Micro ATX, 4 DDR5, HDMI, 2 DP, 2.5G LAN, 3x M.2
ASUS

Asus PRIME B850M-A-CSM - Corporate Stable Model, AMD B850, AM5, Micro ATX, 4 DDR5, HDMI, 2 DP, 2.5G LAN, 3x M.2

Product SKU: AUMBB850MAPRCSM
Available:
Only 13 items in stock
13 items in stock
In stock
Pre-order
Out of stock
£170.37
Notify me When Available
You will receive an email when the product is available.
Want it delivered by
  • Description
  • Shipping & Returns



ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors.

 
The PRIME B850M-A-CSM 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
  • Realtek 2.5Gb Ethernet
  • Dual DisplayPort
  • HDMI
  • Front USB 5Gbps Type-C support
  • BIOS FlashBack
  • Aura Sync
 




ASUS Corporate Stable Model

ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software.

Learn more






ASUS Control Center Express

ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs.
  • Optimize IT endpoint management - Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely.
  • Automate IT maintenance - Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility.
  • Securely manage all of endpoints - Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices.
Learn more
 



 

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-CSM 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-CSM 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-CSM 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-CSM 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-CSM 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.
  • 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-CSM 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-CSM 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.
 

Description

Specification

  • 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: -
  • 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 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 M.2 rubber package
    2 x Screw packages for M.2 SSD
    1 x Quick start guide
    1 x ACC Express activation key card
  • Additional Features: See Overview
  • Package Type: Retail
  • Package Weight: 1.4500 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

Delivery & Shipping Policy

Last updated: 19/09/2025

At Tech Direct UK, we aim to get your order to you as quickly and efficiently as possible. Please see below for our delivery terms.

1. Delivery Options & Costs

  • Free Delivery – Orders over £50 qualify for free UK standard delivery.

  • Standard Delivery – Orders under £50 are charged at £4.99.

2. Delivery Times

  • Next Day Delivery – The majority of items are shipped via next day courier if ordered before 2:00pm (Monday–Friday).

  • Orders placed after 2:00pm, on weekends, or bank holidays will be processed the next working day.

  • Larger or Heavy Items – Certain products (e.g., heavy furniture, oversized goods) may take 2–5 working days for delivery. Estimated times will be displayed at checkout.

3. Delivery Areas

  • We deliver to all mainland UK addresses.

  • Deliveries to remote areas (e.g., Highlands, Islands, Northern Ireland) may take longer or incur additional charges — these will be shown at checkout before confirming your order.

4. Tracking Your Order

  • Once dispatched, you will receive an email confirmation with tracking details (where available).

  • You can track your delivery via the courier’s website.

5. Missed Deliveries

  • If you are not available at the time of delivery, the courier will leave a card or attempt redelivery.

  • Repeated failed delivery attempts may result in the parcel being returned to us. In this case, re-delivery charges may apply.

6. Risk of Loss

  • Risk of loss or damage to the goods passes to you once they are delivered.

  • Please inspect your order upon receipt and notify us of any issues within 48 hours.

7. Contact Us

If you have any questions about delivery, please contact us:
📧 Email: support@techdirectuk.com

Related products

CORSAIR

Corsair NAUTILUS RS LCD Module, Customisable 2.1" IPS LCD Screen, iCUE, White *For Corsair NAUTILUS RS & NAUTILUS RS ARGB CPU Coolers Only*

Corsair NAUTILUS RS LCD Module, Customisable 2.1
£57.35
CORSAIR

Corsair NAUTILUS RS LCD Module, Customisable 2.1" IPS LCD Screen, iCUE, Black *For Corsair NAUTILUS RS & NAUTILUS RS ARGB CPU Coolers Only*

Corsair NAUTILUS RS LCD Module, Customisable 2.1
£57.35
ARCTIC

ARCTIC 80mm Fan Grill, Nickel Plated Steel

ARCTIC 80mm Fan Grill, Nickel Plated Steel
Sold out
ARCTIC

ARCTIC 40mm Fan Grill, Nickel Plated Steel

ARCTIC 40mm Fan Grill, Nickel Plated Steel
Sold out
AKASA

Akasa Black Rubber Case Fan Pins, Anti-Vibration & Resonance, 60-Pack

Akasa Black Rubber Case Fan Pins, Anti-Vibration & Resonance, 60-Pack
Sold out
Product successfully added to your Shopping Cart
Continue shopping View cart
Light
Dark