BIOS
BIOS type	UEFI AMI
BIOS memory size	256 Mbit
ACPI version	6.5
System Management BIOS (SMBIOS) version	3.7
Expansion slots
PCI Express x16 slots	2
PCI Express x16 (Gen 4.x) slots	1
Number of M.2 (M) 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
Features
Motherboard chipset	AMD B840
Audio chip	Realtek ALC897
Audio output channels	7.1 channels
Product colour	Black
Component for	PC
Motherboard form factor	micro ATX
Motherboard chipset family	AMD
Windows operating systems supported	Windows 11 x64
Graphics
On-board graphics card
Internal I/O
USB 2.0 connectors	4
USB 3.2 Gen 1 (3.1 Gen 1) connectors	2
USB 3.2 Gen 2 (3.1 Gen 2) connectors	1
Number of SATA III connectors	4
Total number of SATA connectors	4
Number of CPU fan connectors	1
Number of chassis fan connectors	5
Number of water pump connectors	1
Number of RGB LED pin headers	3
RGB LED pin header
Memory
Supported memory types	DDR5-SDRAM
Number of memory slots	2
Memory slots type	DIMM
Memory channels	Dual-channel
ECC сompatibility	Non-ECC
Supported memory clock speeds	4800,5600,8000 MHz
Supported memory clock speed (max)	8000 MHz
Maximum internal memory	128 GB
Network
Ethernet interface type	2.5 Gigabit Ethernet
LAN controller	Realtek RTL8125D
Top Wi-Fi standard	Not available
Ethernet LAN
Wi-Fi
Processor
Processor manufacturer	AMD
Processor socket	Socket AM5
Compatible processor series	AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets	Socket AM5
Rear panel I/O ports
USB 2.0 ports quantity	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	4
Ethernet LAN (RJ-45) ports	1
HDMI ports quantity	1
HDMI version	2.1
Storage controllers
Supported storage drive types	HDD & SSD
Supported storage drive interfaces	M.2, Micro SATA III
Number of HDDs supported	4
Number of storage drives supported	6
RAID levels	0, 1, 10
RAID support
Weight & dimensions
Width	226 mm
Depth	243.8 mm

MSI PRO B840M‑B – AM5 Micro‑ATX‑Mainboard (Hersteller‑Nr. 7E76‑002R, EAN: 4711377360166) – Solides Desktop‑Mainboard von MSI auf Basis des AMD B840‑Chipsatzes, entwickelt für AMD‑Ryzen‑Prozessoren mit Sockel AM5 und modernen PC‑Builds.
Ideal für leistungsfähige Desktop‑PCs mit moderatem Budget, die moderne Ryzen‑CPUs, schnellen DDR5‑RAM und reichlich Storage‑Erweiterungen nutzen möchten — z. B. für Office, Multimedia oder Alltags‑Gaming. Dank AM5‑Support ist es außerdem vorbereitend für zukünftige CPU‑Generationen.