ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX
From
£151.99
ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX de Asus est disponible chez 1 marchands. Comparez et trouvez le meilleur prix. A partir de 151,99 €.
Listed since 7 April 2026
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£146.96
8 April 2026
Description
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.
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.
Performance
AI Solutions
ASUS AI Solutions include AI Advisor as your technical expert with expertise in PC performance.
AI Advisor
ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.
Performance
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.
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.
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.2
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.
Cooling
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.
Smart Cooling precision
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.
Cooler compatibility
ASUS AIO coolers offer robust performance, high overclocking potential, bold aesthetics and customizable functionality for new motherboards, empowering you to build your dream gaming rig.
Flexibility
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 2.5 Gb 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.
Customization
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 Gen 2 RGB headers
Three addressable Gen 2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.
Customization
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.
Pre-mounted I/O shield
Our pre-installed I/O shield safeguards ports, simplifies the build process, increases functionality and enhances aesthetics for PC DIY enthusiasts.
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.
Build for the most advanced pc for gaming and creating
When only the fastest will do, ASUS motherboards deliver. With faster dual-channel DDR5 memory support, AMD EXPO™ technology and PCIe® 5.0 support for both graphics and NVMe, you can play the most demanding games and deliver your biggest projects with the revolutionary performance of an ASUS motherboard and AMD Ryzen™ 9000, 8000, and 7000 Series processors.
Specifications
| Processor manufacturer | AMD |
| Processor socket | Socket AM5 |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Supported processor sockets | Socket AM5 |
| Supported memory types | DDR5-SDRAM |
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Memory channels | Dual-channel |
| ECC сompatibility | ECC & Non-ECC |
| Supported memory clock speed (max) | 8000 MHz |
| Maximum internal memory | 256 GB |
| Unbuffered memory | Yes |
| Maximum internal memory per slot | 64 GB |
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | PCI Express 4.0, PCI Express 5.0 |
| Number of HDDs supported | 4 |
| Number of storage drives supported | 7 |
| RAID support | Yes |
| RAID levels | 0, 1, 5, 10 |
| Parallel processing technology support | Not supported |
| Maximum resolution | 7680 x 4320 pixels |
| USB 2.0 connectors | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| Number of SATA III connectors | 4 |
| S/PDIF out connector | Yes |
| Front panel audio connector | Yes |
| Front panel connector | Yes |
| ATX Power connector (24-pin) | Yes |
| CPU fan connector | Yes |
| Number of CPU fan connectors | 1 |
| Number of chassis fan connectors | 3 |
| Chassis intrusion connector | Yes |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| EPS power connector (8-pin) | Yes |
| Number of EPS power connectors (8-pin) | 1 |
| Number of COM connectors | 1 |
| TPM connector | Yes |
| 12V power connector | Yes |
| RGB LED pin header | Yes |
| Number of RGB LED pin headers | 3 |
| USB 2.0 ports quantity | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| DisplayPorts quantity | 2 |
| DisplayPort version | 1.4 |
| Headphone outputs | 1 |
| Line-in | Yes |
| Microphone in | Yes |
| Ethernet LAN | Yes |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Wi-Fi | No |
| Motherboard chipset | AMD B850 |
| Audio output channels | 7.1 channels |
| Product colour | Grey |
| Component for | PC |
| Motherboard form factor | micro ATX |
| Motherboard chipset family | AMD |
| Cooling type | Passive |
| Power source type | ATX |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| PCI Express x16 (Gen 4.x) slots | 2 |
| PCI Express x16 (Gen 5.x) slots | 1 |
| Number of M.2 (M) slots | 3 |
| 1st M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 5.0 |
| 2nd M.2 largest key size | 2280 |
| 2nd M.2 highest PCI Express generation | 4.0 |
| 3rd M.2 largest key size | 2280 |
| 3rd M.2 highest PCI Express generation | 4.0 |
| 4th M.2 largest key size | 2280 |
| 4th M.2 highest PCI Express generation | 4.0 |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| Package width | 275 mm |
| Package depth | 275 mm |
| Package height | 67.5 mm |
| Package weight | 1.45 kg |
| Width | 244 mm |
| Depth | 244 mm |
| Cables included | SATA |
| Screws included | Yes |
Full specifications
| Marque | Asus |
| Référence fabricant | 90mb1lq0m0eayc |
| EAN | 4711636054706 |
Why choose the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX in 2026?
In the Computers & Hardware category, the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX by Asus stands out for its positioning in 2026. Compiral lists all available offers to help you buy at the best price. Our comparison tool takes delivery costs into account to calculate the true total price of each offer. Filter by stock availability, free delivery, or sort by ascending price to find the best deal right now.
Technical analysis of the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX
Among the main strengths of the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX, the most notable are its competitive pricing from £151.99 and the recognition of the Asus brand. Buyers who have already used this type of product in the Computers & Hardware category generally highlight the effectiveness of the core functions and ease of maintenance. It is a product that suits both first-time buyers and those replacing existing equipment, with a short learning curve and stable performance over time.
What the tech specs reveal
The ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX spec sheet details the specifications that make a difference in daily use. For a savvy buyer, this data allows objective comparison with other products in the Computers & Hardware category. Asus publishes precise specifications that make comparison easier and help you make an informed purchase decision. Consult the technical specifications table on this page for full details. The ASUS SDRW-08U7M-U optical disc drive DVD±RW Black from the same brand may also interest you for a direct comparison.
In practice day to day
In daily use, the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX is designed to fit easily into the regular habits of Computers & Hardware users. Asus has optimised this model for regular use, with accessible features and simplified maintenance.
Market price ranges in 2026
| Range | Indicative price |
|---|---|
| Entry-level | Under 403200 £ |
| Mid-range | 403200 £ to 940800 £ |
| High-end | Over 940800 £ |
Before buying the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX, remember to check the total price including delivery costs. On Compiral, sorting by total price lets you immediately identify the best offer among all listed retailers. Comparing return conditions and the warranty period offered by each retailer is also a good habit before finalising your order in the Computers & Hardware category.
Frequently asked questions about ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX
Is the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX in stock?
Stock availability for the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX is updated in real time on Compiral. Retailers showing "In stock" can usually deliver quickly, often within 2 to 5 working days. If the product is temporarily out of stock at one retailer, check the other offers in our table. Check back regularly as stock levels change frequently in the Computers & Hardware category.
Where can I buy the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX at the best price?
To buy the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX at the best price, compare all available offers in our table at the top of this page. The 1 offer listed include delivery costs to give you the true total cost. Sort by ascending price and filter by free delivery to quickly identify the best deal among our verified partner retailers.
How does the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX compare to competitors in the Computers & Hardware category?
In the Computers & Hardware category, the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX occupies a specific market segment. Compared to other available models, it stands out mainly through the balance between its features and its price. To compare objectively, consult the detailed spec sheet on this page and compare specifications with other similar products listed on our comparison tool.
Is the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX suitable for beginners?
Yes, the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX is generally appreciated by both beginners and regular users of the Computers & Hardware category. It is quick to set up and Asus usually provides clear documentation. If you are new to this product category, consult the spec sheet on this page to identify the key criteria to check before making your choice.
Is there a refurbished version of the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX?
Refurbished versions of the ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX may be available from certain Compiral partner retailers. These refurbished products allow you to save between 20% and 40% compared to the new price while still benefiting from a warranty. Check availability in our offers table and review the warranty conditions offered by the retailer.
Highlights
Highlights
- ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors
- It’s designed to be Advanced AI PC-ready
- ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality
- The PRIME B850M-A-CSM maximizes the potential of your DDR5 modules
- An Auto-Tuning mode intelligently configures all parameters with a single click
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