AMD Core PRIME B850M-K AMD B850 Socket AM5 micro ATX

Overview

B850M-K
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.

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Compatibility

Socket Socket AM5 Form factor Micro ATX

• Pairs with CPUs using the Socket AM5 socket.
• Physical size is Micro ATX — check your case supports this form factor.

Compatibility data is automatically generated. Always verify critical specs before purchase.

Technical Specifications

Showing 28 key specifications of 76

All values come from this product’s catalog record.

Depth

221 mm

Wi-Fi

No

Width

244 mm

Line-in

Yes

BIOS type

UEFI AMI

RAID levels

0,1,5,10

Cooling type

Passive

Ethernet LAN

Yes

RAID support

Yes

Intended use

PC

Microphone input

Yes

TPM connector

Yes

Colour

Black

Included cables

SATA

Memory channels

Dual-channel

Screws included

Yes

BIOS memory size

256 MB

Socket

Socket AM5

CPU fan connector

Yes

Memory slots type

DIMM

Unbuffered memory

Yes

ECC сompatibility

ECC & non-ECC

RGB LED pin header

Yes

Top Wi-Fi standard

Not available

USB 2.0 connectors

2

12V power connector

Yes

HDMI ports

1

Chipset

AMD B850

Show all 76 specifications

PS/2 ports

1

DVI-D ports quantity

0

S/PDIF out connector

Yes

Audio channels

7.1

DisplayPorts quantity

1

Front panel connector

Yes

Memory slots

2

CPU brand

AMD

Supported memory types

DDR5-SDRAM

USB 2.0 ports

4

Ethernet interface type

2.5 Gigabit Ethernet

Max memory

128 GB

Form factor

Micro ATX

Number of M.2 (M) slots

2

1st M.2 largest key size

2280

2nd M.2 largest key size

2280

Number of COM connectors

1

Number of HDDs supported

4

Ethernet ports

1

Motherboard chipset family

AMD

VGA ports

0

Compatible processor series

AMD Ryzen 7000 Series,AMD Ryzen 8000 Series,AMD Ryzen 9000 Series

EPS power connector (8-pin)

Yes

Front panel audio connector

Yes

Supported CPU sockets

Socket AM5

ATX Power connector (24-pin)

Yes

Number of CPU fan connectors

1

Number of SATA III connectors

4

Supported storage drive types

HDD & SSD

PCI Express x16 (Gen 4.x) slots

1

PCI Express x16 (Gen 5.x) slots

1

Number of chassis fan connectors

3

Number of storage drives supported

6

Supported storage drive interfaces

M.2,SATA III

Windows versions supported

Windows 10 x64,Windows 11

USB 3.2 Gen 1 (3.1 Gen 1) connectors

2

USB 3.2 Gen 2 (3.1 Gen 2) connectors

0

1st M.2 highest PCI Express generation

5.0

2nd M.2 highest PCI Express generation

4.0

Parallel processing technology support

Not supported

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity

2

USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity

0

USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity

2

USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity

0

Package depth

288 mm

Package width

564 mm

Package height

297 mm

Package weight

1069 g

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Sources

User manual objects.icecat.biz Brochure ASUS 90MB1LV0-M0EAY0 icecat.biz Icecat product datasheet Icecat