Asus Prime B840M-A WIFI-CSM Gaming Desktop Motherboard - AMD B840 Chipset - Socket AM5 - Micro ATX

$179.99
$176.60 SAVE $3.39
22 availableas of 09/19/2026

Order within for shipment today

Should arrive by Wed, Sep 30 with free ground shipping

Compliance, certifications and origin

  • China RoHS
  • RoHS
  • WEEE
  • Taiwan RoHS
  • Origin: China
Rated excellent by our customers Read our reviews

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Protect this device

Plans are optional and can be left off. Your order is unchanged unless you add one.

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

About the Asus Prime B840M-A WIFI-CSM

View user manual

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen9000 series processors. The PRIME B840M-A WIFI-CSM 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.

ASUS Corporate Stable Model

ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software.

ASUS Control Center Express

ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs.

Optimize IT endpoint management

Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely.

Automate IT maintenance

Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility.

Securely manage all of endpoints

Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices.

Performance AI Solutions

ASUS AI Solutions include AI Advisor as your technical expert with expertise in PC performance.

AI Advisor

ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.

Performance Digital Power Design

PRIME B840M-A WIFI-CSM features an 8+2+1 phase power design with discrete MOSFETs, ensuring efficient and stable power delivery for AMD processors plus steady performance for day-to-day use.

  • 8 Vcore power
  • 2 SOC power
  • 1 Misc power

The multi-layered printed circuit board design quickly dissipates heat around the voltage regulators to improve overall system stability and provide the CPU with more overclocking headroom.

The Power Saving function contains several settings to easily optimize power consumption and maximize energy savings. You can enable a CPU power limit, darken Aura lighting and set the fan profile to a Power Saving mode. You can also toggle the Power Saver plan that is built into Microsoft Windows.

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings.

Enhanced DDR5 performance

Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B840M-A WIFI-CSM maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits.

Technical specifications

Technical Specifications of the Asus Prime B840M-A WIFI-CSM

General Information

General Information specifications
Manufacturer ASUS Computer International
Manufacturer Part Number PRIME B840M-A WIFI-CSM
Manufacturer Website Address http://usa.asus.com
Brand Name Asus
Product Line Prime
Product Model B840M-A WIFI-CSM
Product Name Prime B840M-A WIFI-CSM Gaming Desktop Motherboard
Packaged Quantity 1
Product Type Gaming Desktop Motherboard

Processor & Chipset

Processor & Chipset specifications
Chipset Manufacturer AMD
Chipset Model B840
Total Processor Supported 1
Processor Socket Socket AM5
Processor Supported Ryzen 7Ryzen 9

Technical Information

Technical Information specifications
AI-powered Yes

Memory

Memory specifications
Number of Memory Slots 4
Memory Form Factor UDIMMDIMM
Maximum Memory 192 GB
Memory Technology DDR5 SDRAM
Memory Speed Supported 7600 MHz
Error Checking ECC

I/O Controller

I/O Controller specifications
Controller Type Serial ATA/600
RAID Supported Yes
RAID Levels 05110

Video

Video specifications
Onboard Video CPU Dependent Video

Audio

Audio specifications
Audio Channels 7.1

Network & Communication

Network & Communication specifications
Bluetooth Yes
Bluetooth Standard Bluetooth 5.3
Gigabit Ethernet Yes
2.5Gigabit Ethernet Yes
Wireless LAN Yes
Wireless LAN Standard IEEE 802.11ax

I/O Expansions

I/O Expansions specifications
Total Number of Expansion Slots 4
PCI Express Standard PCI Express 3.0PCI Express 4.0
Total Number of PCI Express Slots 4
Number of PCI Express x16 Slots 4

Interfaces/Ports

Interfaces/Ports specifications
Total Number of USB Ports 7
S / PDIF Yes
HDMI Yes
DisplayPort Yes
HDMI Version
  • 2.1
Number of Network (RJ-45) Ports 1

Onboard Interfaces

Onboard Interfaces specifications
Number of SATA Interfaces 4
Number of M.2 Interfaces 3
Total Number of Onboard USB Ports 7
Number of Onboard USB 2.0 Ports 4

Physical Characteristics

Physical Characteristics specifications
Form Factor Micro ATX
Width 9.6"
Depth 9.6"

Miscellaneous

Miscellaneous specifications
Country of Origin China
Environmental Compliance China Restriction of Hazardous Substances (China RoHS)Restriction of Hazardous Substances (RoHS)Waste Electrical and Electronic Equipment Directive (WEEE)Taiwan Restriction of Hazardous Substances (Taiwan RoHS)

Warranty

Warranty specifications
Limited Warranty 3 Year

Ratings and reviews

Do you own the Asus Prime B840M-A WIFI-CSM?

Be the first to write a review.

Displaying 1-10 of 70

Similar products you might also like

Motherboards

Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

Need to send it back? Start a return online with a Request RMA and our team will take care of you. Keep the original packaging. Items must be returned in the condition received.

Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.