P/N:90MB1J10-M0EAYC | EAN:4711387797204 | CHECKSUM: A
1 7
Warranty: 1 year
Excl VAT. € 147.63
In stock: 8 ETA: 2026-06-02Weight: 1.45 kg
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.
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
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| BIOS |
| BIOS memory size: 256 Mbit |
| BIOS type: UEFI AMI |
| Expansion slots |
| 1st M.2 highest PCI Express generation: 4.0 |
| 1st M.2 largest key size: 2280 |
| 2nd M.2 highest PCI Express generation: 4.0 |
| 2nd M.2 largest key size: 2280 |
| 3rd M.2 highest PCI Express generation: 3.0 |
| 3rd M.2 largest key size: 2280 |
| Number of M.2 (M) slots: 3 |
| PCI Express x16 (Gen 3.x) slots: 2 |
| PCI Express x16 (Gen 4.x) slots: 1 |
| Features |
| Audio output channels: 7.1 channels |
| Component for: PC |
| Motherboard chipset: AMD B840 |
| Motherboard chipset family: AMD |
| Motherboard form factor: micro ATX |
| Power source type: ATX |
| Product colour: Grey |
| Windows operating systems supported: Windows 10 x64, Windows 11 |
| Graphics |
| Maximum resolution: 7680 x 4320 pixels |
| Parallel processing technology support: Not supported |
| Internal I/O |
| ATX Power connector (24-pin): |
| CPU fan connector: |
| EPS power connector (8-pin): |
| Front panel audio connector: |
| Front panel connector: |
| Number of chassis fan connectors: 2 |
| Number of COM connectors: 1 |
| Number of CPU fan connectors: 2 |
| Number of EPS power connectors (8-pin): 1 |
| Number of RGB LED pin headers: 3 |
| Number of SATA III connectors: 4 |
| RGB LED pin header: |
| S/PDIF out connector: |
| TPM connector: |
| 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 |
| Memory |
| ECC сompatibility: ECC & Non-ECC |
| Maximum internal memory: 192 GB |
| Memory channels: Dual-channel |
| Memory slots type: DIMM |
| Number of memory slots: 4 |
| Supported memory clock speed (max): 7600 MHz |
| Supported memory types: DDR5-SDRAM |
| Unbuffered memory: |
| Network |
| Ethernet interface type: 2.5 Gigabit Ethernet |
| Ethernet LAN: |
| Wi-FiPopular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves.: |
| Other features |
| Quick installation guide: |
| WeightWeight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.: 910 g |
| Packaging content |
| Cables included: SATA |
| Screws included: |
| Packaging data |
| Package depth: 275 mm |
| Package height: 67.5 mm |
| Package weight: 1.45 kg |
| Package width: 275 mm |
| Processor |
| Compatible processor series: AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor manufacturer: AMD |
| Processor socket: Socket AM5 |
| Supported processor sockets: Socket AM5 |
| Rear panel I/O ports |
| DisplayPort version: 1.4 |
| DisplayPorts quantity: 1 |
| DVI-D ports quantity: 0 |
| Ethernet LAN (RJ-45) ports: 1 |
| HDMI ports quantity: 1 |
| HDMI version: 2.1 |
| Headphone outputs: 1 |
| Line-in: |
| USB 2.0 ports quantity: 4 |
| 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 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity: 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity: 0 |
| VGA (D-Sub) ports quantity: 0 |
| Storage controllers |
| Number of HDDs supported: 4 |
| Number of storage drives supported: 7 |
| RAID levels: 0, 1, 5, 10 |
| RAID support: |
| Supported storage drive interfaces: M.2, SATA III |
| Supported storage drive types: HDD & SSD |
| Weight & dimensions |
| DepthThe distance from the front to the back of something.: 244 mm |
| WidthThe measurement or extent of something from side to side.: 244 mm |
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