Asus Prime B840-PLUS WIFI Gaming Desktop Motherboard - AMD B840 Chipset - Socket AM5 - ATX

$199.99
$191.39 SAVE $8.60
61 availableas of 09/19/2026

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Compliance, certifications and origin

  • 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.

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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 B840-PLUS WIFI

PRIME B840-PLUS WIFI

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen9000 series processors. The PRIME B840-PLUS WIFI 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.

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 B840-PLUS WIFI 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 Memory & Storage Performance | Enhanced DDR5 performance

Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B840-PLUS WIFI maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits.1

For entry-level modules without EXPO™ support, ASUS Enhanced Memory Profile (AEMP) automatically detects memory chips and provides optimized profiles for enhanced performance.

For those looking to surpass stock DDR5 speeds, the PRIME B840-PLUS WIFI offers extensive AMD Extended Profiles for Overclocking (EXPO™) support and a wide array of UEFI settings for further performance tweaks.

Three M.2 slots (up to 64 Gbps)

PRIME B840-PLUS WIFI offers a total of three M.2 slots, including two that support data-transfer speeds of up to 64 Gbps via PCIe 4.0, and one that supports PCIe 3.0. This enables quicker boot-up and app load times with OS or application drives.

Cooling | Cooler by design

The PRIME B840-PLUS WIFI motherboard is engineered with multiple onboard heatsinks and an array of hybrid fan headers to help ensure your rig stays cool and stable under intense workloads.

Smart Cooling precision | ASUS Fan Xpert 2+

ASUS Fan Xpert 2+ software provides comprehensive control over fans. An Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.

Technical specifications

Technical Specifications of the Asus Prime B840-PLUS WIFI

General Information

General Information specifications
Manufacturer ASUS Computer International
Manufacturer Part Number PRIME B840-PLUS WIFI
Manufacturer Website Address http://usa.asus.com
Brand Name Asus
Product Line Prime
Product Model B840-PLUS WIFI
Product Name Prime B840-PLUS WIFI 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 9Ryzen 7

Technical Information

Technical Information specifications
AI-powered Yes

Memory

Memory specifications
Number of Memory Slots 4
Memory Form Factor DIMMUDIMM
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 10105

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 6
PCI Express Standard PCI Express 4.0PCI Express 3.0
Total Number of PCI Express Slots 6
Number of PCI Express x1 Slots 1
Number of PCI Express x16 Slots 5

Interfaces/Ports

Interfaces/Ports specifications
Total Number of USB Ports 8
S / PDIF Yes
HDMI Yes
DisplayPort Yes
HDMI Version
  • 2.1
Number of Network (RJ-45) Ports 1
Thunderbolt Yes
Number of Thunderbolt 4 Ports 2

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 ATX
Width 12"
Depth 9.6"

Miscellaneous

Miscellaneous specifications
Package Contents
  • Prime B840-PLUS WIFI Gaming Desktop Motherboard
  • 2 x SATA 6Gb/s cables
  • 1 x ASUS WiFi Q-Antenna
  • 1 x M.2 rubber packages
  • 3 x Screw packages for M.2 SSD
  • 1 x Quick start guide
Country of Origin China
Environmental Compliance Restriction of Hazardous Substances (RoHS)

Warranty

Warranty specifications
Limited Warranty 3 Year

Ratings and reviews

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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.