AMD Core PRIME B840M-R AMD B840 Socket AM5 micro ATX

Overview

Prime B840M-R
ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B840M-R 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 72

All values come from this product’s catalog record.

Depth

229 mm

Wi-Fi

No

Width

236 mm

Height

36.5 mm

Weight

563 g

Line-in

Yes

BIOS type

UEFI AMI

RAID levels

0,1,5,10

Ethernet LAN

Yes

RAID support

Yes

Intended use

PC

Microphone input

Yes

TPM connector

Yes

Colour

Multicolour

Memory channels

Dual-channel

BIOS memory size

256 MB

Socket

Socket AM5

CPU fan connector

Yes

Headphone outputs

1

Memory slots type

DIMM

Unbuffered memory

Yes

ECC сompatibility

non-ECC

Top Wi-Fi standard

Not available

USB 2.0 connectors

2

USB connector type

USB Type-A

12V power connector

Yes

HDMI ports

1

Chipset

AMD B840

Show all 72 specifications

PS/2 ports

1

DVI-D ports quantity

0

S/PDIF out connector

Yes

Audio channels

7.1

DisplayPorts quantity

1

Memory slots

2

CPU brand

AMD

Supported memory types

DDR5-SDRAM

USB 2.0 ports

2

Ethernet interface type

Gigabit Ethernet

Max memory

128 GB

Form factor

Micro ATX

Number of M.2 (M) slots

2

1st 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 9000 Series,AMD Ryzen 8000 Series,AMD Ryzen 7000 Series

EPS power connector (8-pin)

Yes

Front panel audio connector

Yes

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 x1 (Gen 3.x) slots

1

PCI Express x16 (Gen 4.x) slots

1

Number of chassis fan connectors

2

Number of storage drives supported

6

Supported memory clock speed (max)

7600

Supported storage drive interfaces

M.2,SATA III

Windows versions supported

Windows 11,Windows 10 x64

USB 3.2 Gen 1 (3.1 Gen 1) connectors

1

USB 3.2 Gen 2 (3.1 Gen 2) connectors

0

Parallel processing technology support

Not supported

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

4

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

0

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

0

Package depth

270 mm

Package width

260 mm

Package height

51.5 mm

Package weight

924 g

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Sources

User manual objects.icecat.biz Brochure ASUS 90MB1PT0-M0EAY0 icecat.biz Icecat product datasheet Icecat