ASUS Prime B840 Plus WiFi CSM Motherboard

The ASUS Prime Prime B840 Plus WiFi CSM Motherboard supports AMD Ryzen 9000, 8000 and 7000 Series processors with an AM5 socket, featuring up to 4 x DDR5 memory, PCI-E 4.0 and 3.0 compatible expansion slots, 3 x M.2 slots, 4 x SATA ports (6Gb/s), 8 x rear USB ports, 4 x front panel USB header ports, Realtek 2.5Gb LAN, WiFi 6E, Bluetooth 5.3, Realtek 7.1 HD audio codec and an ATX form factor.

Warning: This product contains a button battery
- If swallowed, a lithium battery can cause severe or fatal injuries with 2 hours.
- Keep batteries out of reach of children.
- If you think batteries may have been swallowed or placed inside any of the body, seek immediate medical attention.

Features

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Prime B840-Plus WIFI-CSM

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B840-PLUS WIFI-CSM motherboard provides users and PC DIY builders with a range of performance optimisations 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

• AM5 Socket for AMD Ryzen™ Desktop processors
• 1 x PCIe 4.0 x16
  (supports x16 mode)
  SafeSlot Core+
• 1 x PCIe 3.0 x16
  (max supports x4 mode)
• 2 x PCIe 3.0 x16
  (support x1 mode)
• 8+2+1 phase digital power design
• 4 x DIMM slots
  DDR5 support
  Dual channel
  AEMP
• M.2_1 2280
  (PCIe 4.0 x4 mode)
• M.2_2 2280
  (PCIe 4.0 x4 mode)
• M.2_3 2242/2260/2280
  (PCIe 3.0 x4 mode)

Cooling

• VRM heatsink
• Chassis fan header
• M.2 heatsink
• CPU OPT fan header
• CPU fan header
• AIO pump fan header
• Chipset heatsink
• 3 x Chassis fan headers

Flexibility

• DisplayPort
• 1 x USB 10Gbps Type-A
• HDMI™ port
• BIOS FlashBack™ button
• 4 x USB 2.0 Type-A
• 1 x USB 10Gbps
  Type-C®
• 2.5Gb Ethernet
• 2 x USB 5Gbps Type-A
• WiFi 6E
• 3 x Audio jacks
• 1 x USB 5Gbps header
  (supports 2 additional USB 5Gbps ports)
• 1 x USB 5Gbps connector
  (supports USB Type-C®)
• 2 x SATA 6Gbps ports
• 1 x Thunderbolt™ (USB4®) header
• 2 x SATA 6Gbps ports
• 2 x USB 2.0 headers
  (support 4 additional USB 2.0 ports)

Customisation

• 2 x Addressable gen 2 headers
• 1 x Addressable gen 2 header

ASUS Corporate Stable Model

ASUS Corporate Stable Model (CSM) is a commercial Programme 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 organisation to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software.

* Lifecycle support, Programme offering and supply status may vary by region. Please consult your local sales representative for more information.

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-optimised solution for your business needs.

Optimise 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. (Availability of ASUS AI Advisor may vary by region. AI Advisor functions may vary by platform.)

ASUS AI Advisor is an ASUS technical expert that's always available to answer your questions. Owners of compatible ASUS motherboards can interact with this AI-powered technology using natural language to learn more about their hardware. For DIY beginners, it can provide easy-to-understand explanations of one-click optimisation features like fan speed tuning, and for seasoned PC-building veterans, it can offer guidance and instructions on the latest features offered by ASUS. (Availability of ASUS AI Advisor may vary by region. AI Advisor functions may vary by platform.)

Digital Power Design

PRIME B840-PLUS 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. (Image(s) for reference only)

• 8 - VCORE power
• 2 - SOC power
• 1 - Misc power

Six-Layer PCB Design

Enhanced Stability and Overclocking

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.

Power Saving

Optimise Power with CPU, Lighting, and Fan Settings

The Power Saving function contains several settings to easily optimise power consumption and maximise 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.

Digi+ VRM Control

Real-Time Voltage Control

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 B840M-A WIFI-CSM maximises the potential of your DDR5 modules, from entry-level to extreme-speed kits. (Memory overc