PRIME B840M-A WIFI-CSM

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 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 (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.

PRIME B840M-A 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.

Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely. 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 endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices.

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

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.

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. 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 B840M-A WIFI-CSM offers extensive AMD Extended Profiles for Overclocking (EXPO™) support and a wide array of UEFI settings for further performance tweaks.

PRIME B840M-A WIFI-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.

The PRIME B840M-A WIFI-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+ 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.

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.

Built-in WiFi 6E technology takes advantage of the newly available radio spectrum in the 6 GHz band. With triple the bandwidth of the 2.4/5/6 GHz band, WiFi 6E delivers ultrafast wireless networking speeds with improved capacity and better performance in dense wireless environments.

Realtek 2.5 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.

The PRIME B840M-A WIFI-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.

Form Factor

• micro-ATX Form Factor - 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

CPU

• AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors

Chipset

• AMD B840 Chipset

Memory

• 4 x DIMM slots, max. 192 GB, DDR5 - Supports up to 7600+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)

Graphics

• 2 x DisplayPort** - 1 x HDMI™ port*** - ** Supports max. 8K@30Hz as specified in DisplayPort 1.4. - *** 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 - 2 x PCIe 3.0 x16 slots (support x1 mode)

Storage

• 3 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 2242/2260/2280 (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 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)* - AMD B840 Chipset - M.2_3 slot (Key M), type 2280 (supports PCIe 3.0 x4 mode) - 4 x SATA 6Gb/s ports - * Specifications vary by CPU types. - AMD RAIDXpert2 Technology - Ryzen™ 9000 Series Processors: RAID 0/1/5/10 - Ryzen™ 8000 Series Processors: RAID 0/1 - Ryzen™ 7000 Series Processors: RAID 0/1/10

LAN

• 1 x Realtek 2.5Gb Ethernet - ASUS LANGuard

Wireless & Bluetooth

• Wi-Fi 6E - 2x2 Wi-Fi 6E (802.11ax) - Supports 2.4/5/6GHz frequency band - Bluetooth® v5.3

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.

USB Ports

• Rear USB (Total 7 ports) - 2 x USB 10Gbps ports (2 x Type-A) - 1 x USB 5Gbps port (1 x USB Type-C®) - 4 x USB 2.0 ports (4 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

OS Support

• Windows 11, Windows 10 64-bit

Internal I/O Ports

• Fan and Cooling Related - 1 x 4-pin CPU Fan header - 1 x 4-pin CPU OPT Fan header - 1 x 4-pin AIO Pump 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 - 3 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 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

Back I/O Ports

• 2 x USB 10Gbps ports (2 x Type-A) - 1 x USB 5Gbps port (1 x USB Type-C®) - 4 x USB 2.0 ports (4 x Type-A) - 2 x DisplayPort - 1 x HDMI™ port - 1 x Wi-Fi module - 1 x Realtek 2.5Gb Ethernet port - 3 x Audio jacks - 1 x BIOS FlashBack™ button

Special Features

• ASUS 5X PROTECTION III - DIGI+ VRM - LANGuard - Overvoltage protection - SafeSlot Core+ - Stainless-steel back I/O - ASUS Q-Design - Q-Antenna - Q-Dashboard - Q-DIMM - Q-LED Core - Q-Slot - ASUS Thermal Solution - M.2 heatsink - VRM heatsink design - ASUS EZ DIY - BIOS FlashBack™ button - BIOS FlashBack™ LED - Pre-mounted I/O shield - Aura Sync - Addressable Gen 2 headers

Software Features

• ASUS Exclusive Software - Armoury Crate - Aura Creator - Aura Sync - Fan Xpert 2+ - Power Saving - ASUS DriverHub - ASUS GlideX - TurboV Core - ASUS CPU-Z - Adobe Creative Cloud (Free Trial) - Norton 360 Deluxe (60 Days Free Trial) - WinRAR (40 Days Free Trial) - UEFI BIOS - ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode - ASUS MyHotkey

BIOS

• 256 Mb Flash ROM, UEFI AMI BIOS

Manageability

• WOL by PME, PXE

Accessories

• Cables - 2 x SATA 6Gb/s cables - Miscellaneous - 1 x ASUS WiFi Q-Antenna - 1 x M.2 rubber package - 2 x Screw packages for M.2 SSD - Documentation - 1 x Quick start guide

Warranty

• 3 Years Limited