ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors.
  
  The PRIME B840M-A-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.
  
  
  AMD B840 (AM5 Socket) micro-ATX motherboard
  
  Advanced AI PC-ready
  
  DDR5
  
  PCIe 4.0 Ready
  
  Three M.2 slots
  
  Realtek 2.5Gb Ethernet
  
  Dual DisplayPort
  
  HDMI
  
  Rear and front USB 5Gbps Type-C
  
  BIOS FlashBack
  
  Aura Sync
  
  
  
  
  
  
  
  
  
  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.
  
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  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.
  
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  AI Solutions
  
  
  AI Advisor - ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.
  
  
   
  
   
  
   
  
  
  
   
  
  Digital Power Design
  
   
  
   
  
  PRIME B840M-A-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
  
  
  Six-layer PCB design - Enhanced stability and overclocking.
  
  Power Saving - Optimize power with CPU, lighting, and fan settings.
  
  Digi+ VRM control - Real-time voltage control.
  
  
   
  
  
  
  
  
   
  
  Enhanced Memory & Storage Performance
  
  
  Enhanced DDR5 performance - Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B840M-A-CSM maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits. For entry-level modules without EXPO™ support, ASUS Enhanced Memory Profile (AEMP) automatically detects memory chips and provides optimized profiles for enhanced performance.
  
  Three M.2 slots (up to 64 Gbps) - PRIME B840M-A-CSM 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.
  
  
   
  
   
  
   
  
  
  
   
  
  Cooler by design
  
  
  The PRIME B840M-A-CSM 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.
  
  
  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.
  
  Cooler compatibility - ASUS AIO coolers offer robust performance, high overclocking potential, bold aesthetics and customizable functionality for new motherboards, empowering you to build your dream gaming rig.
  
  
   
  
   
  
  
  
  
   
  
  Empowering connections
  
  
  This motherboard offers a versatile range of connectivity, including support for WiFi 6E, PCIe 4.0 slot and an arsenal of USB ports which includes Type-C® connections.
  
  
  Realtek 2.5 Gb Ethernet - Realtek 2.5 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.
  
  Front USB 5Gbps Type-C® - This motherboard features a USB 5Gbps Type-C® front panel connector for speedy data transfers of up to 5Gbps.
  
  
   
  
   
  
   
  
  
  
   
  
  Personalization
  
   
  
  The PRIME B840M-A-CSM enhances the user experience across the board, from simplifying BIOS setting adjustments to offering customizable RGB lighting controls for a uniquely personal system aesthetic.
  
  
  UEFI BIOS - The UEFI interface delivers easy-to-use configuration options for PC beginners, and advanced features for veterans.
  
  ASUS GlideX - Enable seamless screen sharing and control across PCs, tablets, and smartphones via wired or wireless connections, supporting multiple platforms.
  
  ASUS DriverHub - Simplify driver management with automatic detection, one-click installation and update for smooth, efficient system performance.
  
  Armoury Crate - Customize Aura Sync RGB and