ASUS PRIME B840M-K Motherboard

Fierce PC code
1007109
MPN
90MB1PK0-M0EAY0
  • Socket: AMD AM5
  • Chipset: B840
  • Form Factor: mATX
  • DIMM Slots: x2 DDR5
  • M.2 Slots: x2
  • On-board Wi-Fi: N/A
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B840M-K


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


Internal I/O
Number of M.2 (M) slots 2
USB 3.2 Gen 2 (3.1 Gen 2) connectors 0
Front panel connector Yes
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 2
TPM connector Yes
S/PDIF out connector Yes
Number of SATA III connectors 4
Number of COM connectors 1
Number of chassis fan connectors 3
Front panel audio connector Yes
EPS power connector (8-pin) Yes
CPU fan connector Yes
ATX Power connector (24-pin) Yes
RGB LED pin header Yes
Number of RGB LED pin headers 3
Technical details
Motherboard chipset family AMD
Motherboard chipset AMD B840
Supported processor sockets Socket AM5
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 10 x64, Windows 11
Motherboard chipset family AMD
Motherboard chipset AMD B840
RAID levels 0, 1, 5, 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
Maximum internal memory 128 GB
Unbuffered memory Yes
ECC сompatibility ECC & 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 2.0 ports quantity 2
VGA (D-Sub) ports quantity 0
HDMI ports quantity 1
Ethernet LAN (RJ-45) ports 1
DVI-D ports quantity 0
Network
Ethernet LAN Yes
Wi-Fi No
Ethernet interface type 2.5 Gigabit Ethernet
Features
Windows operating systems supported Windows 10 x64, Windows 11
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
Product colour Black
Expansion slots
Number of M.2 (M) slots 2
PCI Express x16 (Gen 3.x) slots 1
PCI Express x16 (Gen 4.x) slots 1
BIOS
BIOS type UEFI AMI
BIOS memory size 256 Mbit
Packaging data
Package width 270 mm
Package depth 263 mm
Package height 51.5 mm
Package weight 1.02 kg
Software
Windows operating systems supported Windows 10 x64, Windows 11
Weight & dimensions
Package width 270 mm
Package depth 263 mm
Package height 51.5 mm
Package weight 1.02 kg
Width 244 mm
Depth 221 mm
Packaging content
Cables included SATA
Screws included Yes
Other features
Package width 270 mm
Package depth 263 mm
Package height 51.5 mm
Package weight 1.02 kg

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