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ASUS PRIME B840M-K-CSM
MotherboardsAsus

ASUS PRIME B840M-K-CSM

Price TBC

Compatibility Data

SocketAM5
ChipsetAMD B840 Chipset
Memory TypeDDR5
M2 Slots5
Form FactormATX
Model: 35758

Technical Specifications24 specs

General

Model
PRIME B840M-K-CSM
News Updates
  • Please visit our
  • GLOBAL website
  • to check and download the latest updates.
Cpu
  • AMD Socket AM5 for AMD Ryzen
  • ™
  • 9000 & 8000 & 7000 Series Desktop Processors
  • * Refer to
  • https://www.asus.com/support/download-center/
  • for CPU support list.
Chipset
AMD B840 Chipset
Memory
  • 2 x DIMM slots, max. 128GB, DDR5
  • Supports up to 8000+MT/s(OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM
  • Dual channel memory architecture
  • Supports AMD Extended Profiles for Overclocking (EXPO™)
  • ASUS Enhanced Memory Profile (AEMP)
  • * Max Manual Overclocking: Achievable with advanced BIOS configuration and potentially specialized hardware. Results may vary according to system components.
  • * XMP/EXPO/AEMP Profiles: Rated memory module speeds require a BIOS performance profile setting. Results may vary according to system components and can be impacted when four DIMM slots are used.
  • * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit
  • https://www.asus.com/support/download-center/
  • . Adjustments will be made based on the specifications of mass-produced memory products available on the market.
  • * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Graphics
  • 1 x HDMI
  • ™
  • port
  • * Available only on processors featuring integrated graphics. Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
  • ** Supports 4K@60Hz as specified in HDMI 2.1.
Expansion Slots
  • AMD Ryzen™ 9000 & 7000 Series Desktop Processors
  • 1 x PCIe 4.0 x16 slot (supports x16 mode)
  • AMD Ryzen™ 8000 Series Desktop Processors
  • 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
  • AMD B840 Chipset
  • 1 x PCIe 3.0 x16 slot (supports x4 mode)
  • * Please check the PCIe bifurcation table on the support site (
  • https://www.asus.com/support/FAQ/ 1037507/
  • ).
  • ** Specifications vary by CPU types.
  • - To ensure compatibility of the device installed, please refer to
  • https://www.asus.com/support/download-center/
  • for the list of supported peripherals.
Storage
  • Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports
  • AMD Ryzen™ 9000 & 7000 Series Desktop Processors
  • M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
  • M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
  • AMD Ryzen™ 8000 Series Desktop Processors
  • M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
  • M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)
  • AMD B840 Chipset
  • 4 x SATA 6Gb/s ports
  • * Specifications vary by CPU types.
Raid Support
  • AMD RAIDXpert2 Technology
  • Ryzen™ 9000 & 8000 & 7000 Series Processors: RAID 0/1/5/10
Ethernet
  • 1 x Realtek
  • ®
  • 2.5Gb Ethernet
  • ASUS LANGuard
Usb
  • Rear USB (Total 6 ports)
  • 4 x USB 5Gbps ports (4 x Type-A)
  • 2 x USB 2.0 ports (2 x Type-A)
  • Front USB (Total 7 ports)
  • 1 x USB 5Gbps connector (supports USB Type-C
  • ®
  • )
  • 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
  • 2 x USB 2.0 headers support 4 additional USB 2.0 ports
  • * USB Type-C
  • ®
  • power delivery output: max. 5V/3A.
Audio
  • Realtek
  • ®
  • 7.1 Surround Sound High Definition Audio CODEC
  • - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
  • - Supports up to 24-Bit/192 kHz playback
  • Audio Features
  • - Audio Shielding
  • - Premium audio capacitors
  • - Dedicated audio PCB layers
  • * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Back Panel I O Ports
  • 4 x USB 5Gbps ports (4 x Type-A)
  • 2 x USB 2.0 ports (2 x Type-A)
  • 1 x HDMI
  • ™
  • port
  • 1 x Realtek
  • ®
  • 2.5Gb Ethernet port
  • 3 x Audio jacks
Internal I O
  • Fan and Cooling Related
  • 1 x 4-pin CPU Fan header
  • 3 x 4-pin Chassis Fan headers
  • Power Related
  • 1 x 24-pin Main Power connector
  • 1 x 8-pin +12V CPU Power connector
  • Storage Related
  • 2 x M.2 slots (Key M)
  • 4 x SATA 6Gb/s ports
  • USB
  • 1 x USB 5Gbps connector (supports USB Type-C
  • ®
  • )
  • 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
  • 2 x USB 2.0 headers support 4 additional USB 2.0 ports
  • Miscellaneous
  • 3 x Addressable RGB Gen 2 headers
  • 1 x Clear CMOS header
  • 1 x COM Port header
  • 1 x Front Panel Audio header (F_AUDIO)
  • 1 x S/PDIF Out header
  • 1 x SPI TPM header (14-1 pin)
  • 1 x 10-1 pin Front Panel System header
Special Features
  • ASUS 5X PROTECTION III
  • - DIGI+ VRM
  • - LANGuard
  • - Overvoltage protection
  • -  SafeSlot Core+
  • - Stainless-steel back I/O
  • ASUS Q-Design
  • - Q-Dashboard
  • - Q-DIMM
  • - Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
  • - Q-Slot
  • ASUS Thermal Solution
  • - VRM heatsink design
  • Aura Sync
  • -  Addressable RGB Gen 2 headers
Software Features
  • ASUS Exclusive Software
  • Armoury Crate
  • - Aura Creator
  • - Aura Sync
  • - Fan Xpert 2+
  • ASUS DriverHub
  • - ASUS AI Advisor
  • - ASUS CPU-Z
  • - TurboV Core
  • - Norton 360 Deluxe (60 Days Free Trial)
  • - WinRAR (40 Days Free Trial)
  • UEFI BIOS
  • AI Cache Boost
  • ASUS EZ DIY
  • - ASUS CrashFree BIOS 3
  • - ASUS EZ Flash 3
  • - ASUS UEFI BIOS EZ Mode
  • - ASUS MyHotkey
  • * For more software features, please visit the asus support site or refer to
  • www.asus.com/support
  • for additional information.
Bios
32MB (256Mb) Flash ROM, UEFI AMI BIOS
Manageability
WOL by PME, PXE
Accessories
  • Cables
  • 2 x SATA 6Gb/s cables
  • Miscellaneous
  • 1 x I/O shield
  • 1 x Screw package for M.2 SSD
  • Documentation
  • 1 x ACC Express activation key card
  • 1 x Quick start guide
Operating System
Windows 11, Windows 10 64-bit
Form Factor
  • micro-ATX Form Factor
  • 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )

Physical Dimensions

Length Mm
243.8
Width Mm
221
Height Mm
619.8

Where to Buy

eBay
UK
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