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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-K motherboard is designed for those who need robust performance and reliability. With support for AMD B850 chipset, this micro ATX motherboard accommodates Ryzen 7000/8000/9000 Series processors. A dual-channel memory architecture supports DDR5 SDRAM with speeds reaching 4200 MHz, ensuring smooth multitasking and responsiveness. The motherboard features an array of connectivity options, including dual M.2 slots and multiple USB ports, catering to diverse storage and device needs. Equipped with ASUS's innovative technologies, such as the EZ Flash BIOS and DIGI+ VRM, the PRIME B850M-K enhances system stability and ease of use. It also includes AMD RAID Xpert2 Technology for optimal storage management, and with 2.5 Gigabit Ethernet, networking demands are met efficiently. Advanced safety features like ESD Guards and overvoltage protection bolster hardware integrity, making this motherboard a dependable choice for building powerful systems.


Specification Summary

Product Description
ASUS PRIME B850M-K - motherboard - micro ATX - Socket AM5 - AMD B850
Product Type
Motherboard - micro ATX
Chipset Type
AMD B850
Processor Socket
1 x Socket AM5
Compatible Processors
(supports Ryzen 7000/8000/9000 Series)
Max RAM Size
256 GB
RAM Supported
2 DIMM slots - DDR5, on-die ECC, non-ECC, ECC
Storage Ports
4 x SATA-600, 2 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 x USB 2.0 via headers)
Audio
HD Audio (8-channel)
LAN
2.5 Gigabit Ethernet

Specifications

EAN / GTIN:
4711636005524
General
Product Type
Motherboard - micro ATX
Chipset Type
AMD B850
Processor Socket
Socket AM5
Max Processors Qty
1
Compatible Processors
(supports Ryzen 7000/8000/9000 Series)
Supported RAM
Max Size
256 GB
Technology
DDR5
Bus Clock
4000 MHz, 4100 Mhz (O.C), 4200 MHz (O.C.)
Supported RAM Integrity Check
On-die ECC, non-ECC, ECC
Features
Dual channel memory architecture, AMD EXPO technology
Audio
Type
HD Audio (8-channel)
Compliant Standards
High Definition Audio
LAN
Network Interfaces
2.5 Gigabit Ethernet
Expansion / Connectivity
Expansion Slots
1 x CPU ¦ 2 x DIMM 288-pin ¦ 1 x PCIe 5.0 x16 ¦ 1 x PCIe 4.0 x16 (x4 mode) ¦ 1 x M.2 socket (2280 M.2 slot) ¦ 1 x M.2 socket (2242/2260/2280 M.2 Key M slot)
Storage Interfaces
SATA-600 -connectors: 4 x 7pin Serial ATA ¦ PCIe 4.0 -connectors: 1 x M.2 ¦ PCIe 5.0 -connectors: 1 x M.2
RAID Features
AMD RAID Xpert2 Technology
Interfaces
1 x HDMI ¦ 1 x DisplayPort ¦ 1 x PS/2 keyboard / mouse ¦ 2 x USB 3.2 Gen 2 ¦ 2 x USB 3.2 Gen 1 ¦ 4 x USB 2.0 ¦ 1 x LAN (2.5Gigabit Ethernet) ¦ 1 x audio line-out - mini-jack ¦ 1 x microphone - mini-jack ¦ 1 x audio line-in - mini-jack
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 serial - header ¦ 1 x SPDIF out - header ¦ 1 x SPI - header ¦ 1 x audio - header
Power Connectors
24-pin main power connector, 8-pin ATX12V connector
Features
BIOS Type
AMI
BIOS Features
UEFI BIOS, ASUS EZ Flash
Sleep / Wake Up
Wake on PME, wake on LAN (WOL)
Hardware Features
ASUS Enhanced Memory Profile (AEMP), 8+2+1 Phase Power Design, ASUS OptiMem II, LANGuard, audio jack detect technology, jack retasking, anti-pop function, BIOS FlashBack button, Water Pump Header, BMC remote management, ASUS 5X Protection III, ASUS DIGI+ VRM, ESD Guards, overvoltage protection, ASUS SafeSlot, ASUS Stainless Steel Back I/O, ASUS Q-Design, Q-Code, M.2 Q-Latch, ASUS Q-Connector, Q-DIMM, Q-LED, Q-Slot, M.2 heatsink, VRM heatsink design, ASUS EZ DIY, CPU Socket lever protector, BIOS FlashBack LED, CrashFree BIOS 3, DIY Friendly Design, Windows 11 compatible, Preboot eXecution Environment (PXE), ASUS Enhanced Memory Profile (AEMP) III
Miscellaneous
Included Accessories
IO shield, M.2 screw package, M.2 backplate rubber package
Cables Included
2 x Serial ATA cable
Software Included
Armoury Crate, ASUS Fan Xpert 4, ASUS CPU-Z, Adobe Creative Cloud (free trial), Norton 360 Deluxe (60 days trial), WinRAR, ASUS Control Center Express
Width
24.4 cm
Depth
22.1 cm

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