AM5, AMD B840, 2 x DIMM slots, max. 128GB, DDR5, 1Gb Ethernet, 32MB (256Mb) Flash ROM, UEFI AMI BIOS, micro-ATX

Description

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.

Specifications

Internal I/O
Number of M.2 (M) slots 2
USB 3.2 Gen 2 (3.1 Gen 2) connectors 0
12V power connector Yes
Supported storage drive interfaces M.2, SATA III
USB 2.0 connectors 2
USB 3.2 Gen 1 (3.1 Gen 1) connectors 1
TPM connector Yes
S/PDIF out connector Yes
Number of SATA III connectors 4
Number of COM connectors 1
Number of chassis fan connectors 2
Front panel audio connector Yes
EPS power connector (8-pin) Yes
CPU fan connector Yes
ATX Power connector (24-pin) Yes
Number of CPU fan connectors 1
Technical details
Motherboard chipset family AMD
Motherboard chipset AMD B840
Parallel processing technology support Not supported
Motherboard form factor micro ATX
Component for PC
Audio
Audio output channels 7.1 channels
Performance
Number of HDDs supported 4
Supported storage drive types HDD & SSD
Windows operating systems supported Windows 11, Windows 10 x64
Motherboard chipset family AMD
Motherboard chipset AMD B840
RAID levels 0, 1, 5, 10
Audio output channels 7.1 channels
Motherboard form factor micro ATX
Component for PC
Processor
Processor manufacturer AMD
Compatible processor series AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series
Processor socket Socket AM5
Memory
Number of memory slots 2
Memory slots type DIMM
Supported memory types DDR5-SDRAM
Memory channels Dual-channel
Maximum internal memory 128 GB
Unbuffered memory Yes
Supported memory clock speed (max) 7600 MHz
ECC сompatibility Non-ECC
Storage controllers
Number of HDDs supported 4
Supported storage drive types HDD & SSD
Supported storage drive interfaces M.2, SATA III
RAID levels 0, 1, 5, 10
Number of storage drives supported 6
RAID support Yes
Graphics
Parallel processing technology support Not supported
Rear panel I/O ports
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
USB connector type USB Type-A
USB 2.0 ports quantity 2
VGA (D-Sub) ports quantity 0
PS/2 ports quantity 1
Microphone in Yes
Headphone outputs 1
HDMI ports quantity 1
Ethernet LAN (RJ-45) ports 1
DVI-D ports quantity 0
DisplayPorts quantity 1
Line-in Yes
Network
Ethernet LAN Yes
Wi-Fi No
Ethernet interface type Gigabit Ethernet
Features
Windows operating systems supported Windows 11, Windows 10 x64
Motherboard chipset family AMD
Motherboard chipset AMD B840
Audio output channels 7.1 channels
Motherboard form factor micro ATX
Component for PC
Product colour Multicolour
Expansion slots
Number of M.2 (M) slots 2
PCI Express x1 (Gen 3.x) slots 1
1st M.2 largest key size 2280
BIOS
BIOS type UEFI AMI
BIOS memory size 256 Mbit
Packaging data
Package width 260 mm
Package depth 270 mm
Package height 51.5 mm
Package weight 924 g
Software
Windows operating systems supported Windows 11, Windows 10 x64
Weight & dimensions
Height 36.5 mm
Package width 260 mm
Package depth 270 mm
Package height 51.5 mm
Package weight 924 g
Weight 563 g
Width 236 mm
Depth 229 mm
Other features
Height 36.5 mm
Package width 260 mm
Package depth 270 mm
Package height 51.5 mm
Package weight 924 g
Weight 563 g
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