MSI PRO B840M-B motherboard AMD B840 Socket AM5 micro ATX

Socket AM5, AMD B840 Chipset, 2 x DDR5-SDRAM up to 128GB, LAN, 1 x RJ-45, 4 x SATA III, 2 x M.2(M), UEFI AMI, Micro ATX

Key Features

• Supports AMD Ryzen™ 9000 / 8000 / 7000 Series Desktop Processors
• Supports DDR5 Memory, Dual Channel DDR5 8000+ MT/s (OC)
• Ultra Performance: Direct 7+2+1 Power System with P-PAK, 8-pin CPU power connector, Core Boost, Memory Boost, 6-layer PCB made by 2oz thickened copper
• EZ DIY: EZ M.2 Clip II and EZ PCIe Clip II
• Lightning Fast Game experience: PCIe 4.0 slot and Lightning Gen 4 x4 M.2
• 2.5G LAN: the remarkable solution for professional and multimedia use, delivering secure, stable, and high-speed networking and data transmission
• Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience

Description

BUSINESS ELEGANCE
The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.

MSI motherboards are designed with advanced hardware and technology, well-supporting the demanding computing usage of gaming and AI. Moreover, we also introduce AI to MSI Center and BIOS, making everything more effortless than before.

DIRECT 7+2+1 POWER DESIGN
Unleash and sustain the maximum performance with a VRM design built with a total of 7+2+1 digital power phases. With an 8-pin power connector, PRO B840M-B is ready for the challenge of heavy-loading tasks.

Chipset Heatsink
The chipset heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.

HIGH-BANDWIDTH AND LOW-LATENCY NETWORK
MSI’s premium network solution provides incredible data transfer speed for demanding users.

Specifications

Internal I/O
Number of M.2 (M) slots	2
Number of SATA Express connectors	0
USB 3.2 Gen 2 (3.1 Gen 2) connectors	1
Total number of SATA connectors	4
Supported storage drive interfaces	M.2, Micro SATA III
USB 2.0 connectors	4
USB 3.2 Gen 1 (3.1 Gen 1) connectors	2
mSATA ports quantity	0
Number of SATA connectors	0
Number of SATA III connectors	4
Number of SATA II connectors	0
Number of chassis fan connectors	5
RGB LED pin header	Yes
Number of CPU fan connectors	1
Number of water pump connectors	1
Number of RGB LED pin headers	3
Technical details
Motherboard chipset family	AMD
Motherboard chipset	AMD B840
Supported processor sockets	Socket AM5
On-board graphics card	No
HDMI version	2.1
Motherboard form factor	micro ATX
Component for	PC
Total number of SATA connectors	4
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 x64
Motherboard chipset family	AMD
Motherboard chipset	AMD B840
RAID levels	0, 1, 10
Supported processor sockets	Socket AM5
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Component for	PC
Processor
Processor manufacturer	AMD
Compatible processor series	AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets	Socket AM5
Processor socket	Socket AM5
Memory
Number of memory slots	2
Memory slots type	DIMM
Supported memory types	DDR5-SDRAM
Memory channels	Dual-channel
Supported memory clock speeds	4800,5600,8000 MHz
Maximum internal memory	128 GB
Supported memory clock speed (max)	8000 MHz
ECC сompatibility	Non-ECC
Storage controllers
Number of HDDs supported	4
Supported storage drive types	HDD & SSD
Supported storage drive interfaces	M.2, Micro SATA III
RAID levels	0, 1, 10
Number of storage drives supported	6
RAID support	Yes
Graphics
On-board graphics card	No
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 2.0 ports quantity	2
VGA (D-Sub) ports quantity	0
HDMI version	2.1
HDMI ports quantity	1
Ethernet LAN (RJ-45) ports	1
DVI-D ports quantity	0
Network
Ethernet LAN	Yes
Wi-Fi	No
LAN controller	Realtek RTL8125D
Ethernet interface type	2.5 Gigabit Ethernet
Features
Windows operating systems supported	Windows 11 x64
Motherboard chipset family	AMD
Motherboard chipset	AMD B840
Supported processor sockets	Socket AM5
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Component for	PC
Audio chip	Realtek ALC897
Product colour	Black
Expansion slots
Number of M.2 (M) slots	2
PCI Express x16 slots	2
1st M.2 largest key size	2280
1st M.2 highest PCI Express generation	4.0
2nd M.2 largest key size	2280
2nd M.2 highest PCI Express generation	4.0
BIOS
BIOS type	UEFI AMI
BIOS memory size	256 Mbit
ACPI version	6.5
System Management BIOS (SMBIOS) version	3.7
Software
Windows operating systems supported	Windows 11 x64
Weight & dimensions
Width	226 mm
Depth	243.8 mm
Other features
mSATA ports quantity	0