ASUS PRIME B840M-A-CSM AMD B840 Socket AM5 micro ATX 90MB1J10-M0EAYC

General Information for Asus Motherboards

ASUS PRIME B840M-A-CSM, AMD, Socket AM5, AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series, Socket AM5, DDR5-SDRAM, 192 GB

PRIME B840M-A-CSM

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. Its 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.7

Performance
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.5

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 B840M-A-CSM maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits.2
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-CSM offers extensive AMD Extended Profiles for Overclocking (EXPO) support and a wide array of UEFI settings for further performance tweaks.3

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.4

Cooling
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.

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. Theres 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.5

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.5

Flexibility
Empowering connections
This motherboard offers a versatile range of connectivity, including support for 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.5

Customization
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 DriverHub
Simplify driver management with automatic detection, one-click installation and update for smooth, efficient system performance.

Armoury Crate
Customize Aura Sync RGB and control ASUS devices. Includes product registration and updates.

Aura Sync
Complete RGB lighting control for enthusiast systems, ensuring seamless synchronization with compatible hardware.

Addressable Gen 2 RGB headers
Three addressable Gen 2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.

Customization
DIY friendly
The PRIME B840M-A-CSM motherboard features EZ PC DIY innovations that simplify and speed up the PC building process, making DIY easy and convenient.

Pre-mounted I/O shield
Our pre-installed I/O shield safeguards ports, simplifies the build process, increases functionality and enhances aesthetics for PC DIY enthusiasts.

BIOS FlashBack
BIOS FlashBack simplifies BIOS updates. Just load the BIOS file onto a FAT32 USB stick, insert it into the BIOS FlashBack port, and press a button no CPU or memory needed.

SafeSlot Core+
SafeSlot Core+ is a one-piece stainless-steel brace that shields the slot to protect it from damage. The metal cover is tightly secured to the slot with hooks, and the entire assembly is firmly anchored to the PCB with strengthened solder points to provide a secure foundation for heavyweight graphics cards.

Q-LED Core
The Q-LED Core display produces color-coded lights during the Power-On Self-Test (POST) that can help you troubleshoot potential issues.

Build for the most advanced pc for gaming and creating
When only the fastest will do, ASUS motherboards deliver. With faster dual-channel DDR5 memory support, AMD EXPO technology and PCIe 4.0 support for both graphics and NVMe, you can play the most demanding games and deliver your biggest projects with the revolutionary performance of an ASUS motherboard and AMD Ryzen 9000, 8000, and 7000 Series processors. PRIME B840M-A-CSM

Further details for this product, PRIME B840M-A-CSM, can be found at the manufacturer website. Please note, these web addresse(s) are supplied by 3rd parties, Quzo UK is not responsible for the content.

PRIME B840M-A-CSM motherboard socket AMD AM5 (AMD B840, mATX, DDR5 memory, 3x M.2, PCIe 4.0, Aura Sync)

ASUS PRIME B840M-A-CSM. Processor manufacturer: AMD, Processor socket: Socket AM5, Compatible processor series: AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. Supported memory types: DDR5-SDRAM, Maximum internal memory: 192 GB, Memory slots type: DIMM. Supported storage drive interfaces: M.2, SATA III, Supported storage drive types: HDD & SSD, RAID levels: 0, 1, 5, 10. Maximum resolution: 7680 x 4320 pixels. Ethernet interface type: 2.5 Gigabit Ethernet

ASUS PRIME B840M-A-CSM AMD B840 Socket AM5 micro ATX 90MB1J10-M0EAYC Specifications

Product Type Motherboards Brand ASUS Collection Model Asus PRIME B840M-A-CSM Manufacturer Product Type Asus Motherboards Manufacturer Product Type AMD Motherboards Product colour Grey Form Factor Micro ATX Product colour Multicoloured Product Family PRIME B840M-A-CSM Processor socket Socket AM5 Processor manufacturer AMD Maximum Resolution 7680 x 4320 Pixels Motherboard chipset AMD B840 Parallel processing technology support Not supported Supported memory types DDR5-SDRAM Number of memory slots 4 Maximum internal memory 192 GB Memory slots type DIMM ECC ompatibility ECC & Non-ECC Supported memory clock speed (max) 7600 MHz Unbuffered memory Yes Number of storage drives supported 7 RAID support Yes Supported storage drive types HDD & SSD Supported storage drive interfaces M.2, SATA III RAID levels 0, 1, 5, 10 Number of HDDs supported 4 Ethernet LAN Yes Ethernet interface type 2.5 Gigabit Ethernet Wi-Fi No HDMI ports quantity 1 Ethernet LAN (RJ-45) ports 1 DisplayPorts quantity 1 DVI-D ports quantity 0 HDMI version 2.1 USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity 0 USB 2.0 ports quantity 4 Number of SATA III connectors 4 USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity 2 USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 0 USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity 1 Line-in Yes Headphone outputs 1 DisplayPort version 1.4 VGA (D-Sub) ports quantity 0 PCI Express x16 (Gen 3.x) slots 2 PCI Express x16 (Gen 4.x) slots 1 Number of M.2 (M) slots 3 1st M.2 largest key size 2280 1st M.2 highest PCI Express generation 4.0 2nd M.2 largest key size 2280 2nd M.2 highest PCI Express generation 4.0 3rd M.2 largest key size 2280 3rd M.2 highest PCI Express generation 3.0 Power source type ATX Windows operating systems supported Windows 10 x64, Windows 11 Weight 910 g Width 244 mm Depth 244 mm Net Weight 0.91Kg USB 2.0 connectors 2 USB 3.2 Gen 1 (3.1 Gen 1) connectors 2 USB 3.2 Gen 2 (3.1 Gen 2) connectors 0 S/PDIF out connector Yes Front panel audio connector Yes Front panel connector Yes ATX Power connector (24-pin) Yes CPU fan connector Yes Number of chassis fan connectors 2 Number of CPU fan connectors 2 EPS power connector (8-pin) Yes Number of EPS power connectors (8-pin) 1 Number of COM connectors 1 TPM connector Yes RGB LED pin header Yes Number of RGB LED pin headers 3 Front panel audio connector 1 Compatible processor series AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series Supported processor sockets Socket AM5 Audio output channels 7.1 channels BIOS type UEFI AMI BIOS memory size 256 Mbit Component for PC Motherboard chipset family AMD Memory channels Dual-channel Gross weight 1.35Kg Features RGB Lighting Package width 275 mm Package depth 275 mm Package weight 1.45 kg Package height 67.5 mm Package length 27.5cm Package width 27.5cm Package Type NA Package height 6.75cm Quick installation guide Yes Screws included Yes Motherboard form factor Micro ATX Chipset AMD B840 Web Address www.asus.com RAM Slots 4 x 288-pin Back HDMI Port(s) 1 24-pin ATX Power 1 8-pin ATX Power 1 USB 2.0 Header(s) 2 COM Port Header(s) 1 TPM Header(s) 1 Product Width 244mm PCI Express 4.0 x16 1 Back LAN Port(s) 1 Back Audio Jack(s) 3 Back USB 2.0 Port(s) 4 PCI Express 3.0 x16 2 RAID Raid 0/1/5/10 S/PDIF Out Header(s) 1 RAM Technology DDR5 (Dual Channel) On-Board Audio Realtek 7.1 Surround Sound High Definition Audio CODEC Product Length 244mm M.2 Socket(s) 2 x PCIe Gen 4.0 x41 x PCIe Gen 3.0 x4 Back DisplayPort(s) 2 S-ATA 6Gb/s Port(s) 4 CPU Interface Socket AM5 Back Button(s) 1 x BIOS FlashBack BIOS 256 Mb Flash ROM, UEFI AMI BIOS RAM Speeds Up to DDR5 7600 (O.C.) Max. Memory Support 192GB On-Board Video Processor with integrated graphics is required USB 5Gbps Header(s) 2 Back USB 10Gbps Port(s) Type-A 2 Internal Other Port(s) 3 x Addressable Gen 2 headers Back USB 5Gbps Port(s) Type-A 1 LAN Speed 1 x Realtek 2.5Gb EthernetASUS LANGuard Model Number PRIME B840M-A-CSM Keywords MotherboardAM5B840DDR5Micro ATX MPN 90MB1J10-M0EAYC Video Inputs DisplayPort

ASUS PRIME B840M-A-CSM AMD B840 Socket AM5 micro ATX 90MB1J10-M0EAYC Reviews

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