ASUS PRIME B850M-K AM5 DDR5 PCIe 5.0 mATX Motherboard
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ASUS PRIME B850M-K AM5 DDR5 PCIe 5.0 mATX Motherboard
Scan code: LN158656 Manufacturer code: 90MB1LV0-M0EAY0
£139.99Item due on 28 May 2025
Due 28th May
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ASUS PRIME B850M-K AM5 DDR5 PCIe 5.0 mATX Motherboard

ASUS B850M-K, AMD B850, S AM5, DDR5, PCIe 5.0, 2 x M.2, 2.5GbE, USB 3.2, AMD EXPO, mATX

Scan code: LN158656 Manufacturer code: 90MB1LV0-M0EAY0
£139.99
£5.48 Next day delivery
Item due on 28 May 2025
Due 28th May
Pay in 3 interest-free payments of £46.66

Email me when the availability or price changes

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Product Overview

ASUS B850M-K Motherboard

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B850M-K 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.


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-K 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.


Enhanced DDR5 Performance

Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B850M-K 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-K offers extensive AMD Extended Profiles for Overclocking (EXPO™) support and a wide array of UEFI settings for further performance tweaks.


Two M.2 slots (up to 128 Gbps)

PRIME B850M-K offers a total of two M.2 slots, including one that supports data-transfer speeds of up to 128 Gbps via PCIe 5.0, and one 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-K 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® connection.


2.5Gb Ethernet

Realtek 2.5 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.


High Speed Transferring

Numerous USB ports support high-end rigs loaded with peripherals, including two rear USB Type-A ports with transmission speeds of up to 10Gbps and a front USB Type-C® connector with ultrafast USB 5Gbps for transmission speeds of up to 5Gbps.


Personalization

The PRIME B850M-K 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.


DIY Friendly

The PRIME B850M-K 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.

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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.




Features

• 8+2+1 phase digital power design.
• AEMP for enhanced DDR5 performance.
• USB 10Gbps Type-A for rapid data transmission.
• AI Solutions for advanced AI capabilities.
• USB 5Gbps Type-C® for rapid data transmission.
• PCIe 5.0 slots for graphics card and storage.
• EZ PC DIY for easier build customization.
• 2.5Gb Ethernet for faster data transfers.
• Aura Sync for full RGB lighting control.

Specifications
Core Specifications
Edition PRIME B850M-K
Form Factor MicroATX
CPU Socket AM5
Chipset AMD B850
RAM Memory Support
Memory Type DDR5
Memory Channel Dual (2)
Memory Type (ECC) ECC/Non-ECC
Memory Type (R/U) UDIMM (Unbuffered)
Memory Speed (Mhz) DDR5 - 8200(OC)
Max. Memory Capacity 128GB
Audio
Audio 7.1 Channel HD Audio
Graphics Support
Primary GPU Interface PCIe 5.0 (x16)
NVIDIA SLI Support N/A
AMD CrossFire Support N/A
Integrated Graphics Requires Processor Graphics or Discrete GPU
On-Board Graphics Connectors
  • DisplayPort 1.4
  • HDMI 2.1
Internal Connectivity
Expansion Slots
  • 1 x M.2, 22-42/60/80, PCIe Gen4x4
  • 1 x M.2, 22-80/110, PCIe Gen5x4
  • 1 x PCIe 4.0 x16 (x4 Bandwidth)
  • 1 x PCIe 5.0 x16
  • 4 x SATA 6GB/s
SATA Support SATA3
RAID Support via Yes
Storage Mode Support
  • RAID 0
  • RAID 1
  • RAID 10
  • RAID 5
Internal I/O
  • 1 x 24-pin (Power)
  • 1 x 4-pin AIO Pump Connector
  • 3 x 4-pin CHA_FAN connector
  • 1 x 4-pin CPU Fan Connector
  • 1 x 8-pin (Power)
  • 3 x Addressable Gen 2 Header
  • 1 x Clear CMOS Header
  • 1 x Front Panel Audio Header
  • 2 x M.2
  • 1 x S/PDIF-Out Header
  • 4 x SATA III - 6Gb/s
  • 1 x Serial (COM) Header
  • 1 x System panel connector
  • 1 x TPM (SPI_TPM) header
  • 2 x USB 2.0 Header
  • 1 x USB 3.2 Gen1
  • 1 x USB 3.2 Gen1 Header
External Connectivity
Network Interface Type Wired 2.5 Gigabit LAN (10/100/1000/2500)
Network Chip/Modules 1 x Realtek (2.5GbE LAN)
Rear I/O Connectors
  • 1 x BIOS Flashback Button
  • 1 x DisplayPort 1.4
  • 1 x HDMI 2.1
  • 1 x Line In
  • 1 x Line Out
  • 1 x Mic-In
  • 1 x PS/2 Keyboard/Mouse Combo
  • 1 x RJ-45
  • 4 x USB 2.0
  • 2 x USB 3.2 Gen1 Type-A
  • 2 x USB 3.2 Gen2 Type-A
Additional Specifications
Water Cooled No
Cooling Passive Heatsinks
QPI Speed N/A
Board Dimensions 244 x 244 mm
Note  
Additional Information
Scan Code LN158656
Model Number 90MB1LV0-M0EAY0
GTIN 4711636005524
Warranty

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

Details
Duration:
36 months
Type:
Direct
DOA Period:
1 days
Manufacturer Contact Details
Manufacturer:
ASUS
Telephone:
01442 265548
Buying Guide
Need help choosing the right board? Read our AMD Motherboard Buying Guide
ASUS PRIME B850M-K AM5 DDR5 PCIe 5.0 mATX Motherboard
ASUS PRIME B850M-K AM5 DDR5 PCIe 5.0 mATX Motherboard