MSI B840 M – B AMD Chipset

 

 

 

 

PRO B840M-B

PRO B840M-B is engineered with many exclusive features of MSI, PCIe 4.0 M.2, EZ PCIe Clip II, 2.5G LAN, and Front Type-C, ready for the AMD Ryzen™ 9000 series processors.

 

 

 

 

PRO BUSINESS ELEGANCE

The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.

MSI motherboards are designed with advanced hardware and technology, well-supporting the demanding computing usage of gaming and AI. Moreover, we also introduce AI to MSI Center and BIOS, making everything more effortless than before.

• AI Engine
  provides several categories for you to sync the applications you want to perform and automatically optimizing them to create a comfortable environment.
• AI LAN MANAGER
  optimizes networking performance and minimizes latency, providing a seamless online experience.
• Frozr AI Cooling
  automatically adjusts fan duty to make sure the system stays in cool, stable and high performance.
• AI Boost
  is an MSI exclusive feature. It overclocks NPU to improve higher AI performance.

EZ DIY

ONE-FINGER

EZ M.2 INSTALLATION

EZ  M.2 CLIP II

MSI’s exclusive EZ M.2 CLIP II makes M.2 installation seamless. Insert the SSD card into the slot and press it down to lock it in place with the clip. As fasten the SSD, flick the clip outwards and then the SSD is removed. The process is smooth, and you don’t need to use your tools like before. One finger can give you perfect DIY experience.

EZ M.2 CLIP II REMOVER

Introducing MSI’s EZ M.2 CLIP II Remover, a handy tool designed to simply switching or repositioning the EZ M.2 CLIP II on you motherboard. This tool allows users to effortlessly detach the EZ M.2 CLIP II from the motherboard and reattach it to any desired M.2 slot. It is included in the accessory kit that comes with MSI motherboards.

EZ GPU INSTALLATION

One Finger for EZ GPU Installation
The new EZ PCIe Clip II, located on the first slot, features the rebounding force mechanism that allows for easy removal of the graphics card by pressing the tail-like lock with one finger. Due to this exquisite design, users can uninstall the graphics cards effortlessly, even in the cramped case spaces.

EZ BUTTON

FLASH BIOS BUTTON

Flash the BIOS with only a connected power supply by following a few steps. CPU and memory not required.

CLEAR CMOS BUTTON

Restore the BIOS to the default settings – helpful in 99% of the cases to successfully boost again.

ONE HAND

EZ MOUNTING

MSI motherboards circuitry ensure the case standoff keep out zones are pure and clean. Moreover, the protective paint is printed around each screw hole to prevent parts from being scratched or damaged to the motherboard.

• Avoid Collision Notification
• Keep Out Zone
• Double ESD Protection

 

ONE STEP

Driver Utility Installer

Once connected to the internet, MSI Driver Utility Installer will detect and present suitable drivers and utilities automatically, you can download and install with just a few clicks.

*Please ensure to connect the internet, or the Driver Utility Installer won’t launch automatically.
*MSI Driver Utility Installer will be ready in Windows 11 build 22H2.

ONE GLANCE

EZ DEBUG

EZ DEBUG LED
Onboard LEDs will indicate the source of the problem so you know exactly where to look to get up and running again.

EZ Memory Detection LED
This LED lights up when it detects faulty memory in slots, eliminating guesswork from troubleshooting.

EZ Identify

• Header With Different Color:   To better differentiate between pin headers for different purposes, mark the pump sys header and ARGB headers in white, enabling users to manage cables more efficiently.
• Identify M.2 Signal Source:   The motherboard has a detailed M.2 signal source list printed on it, allowing you to easily identify them.
• Identify USB Speed:   Change the way USB speeds are described to numbers (rather than the confusing names like USB 3.2 Gen 2×2) for better understanding

ONE CLICK

EZ Overclocking

While overclocking can be overly complex for some, MSI Click BIOS X made it more accessible with multiple one-click overclock features for both processor and memory, allowing users to easily enhance system performance without delving into intricate settings.

• AI BOOST
  An intelligent algorithm boosts NPU performance to get the best possible AI performance when you need additional horsepower.
  *Enabled with compatible processors.
• EXPO / A-XMP
  Choose from preset EXPO and A-XMP profiles to automatically overclock compatible DDR memory for optimal performance.

EZ Optimization

A host of features inject artificial intelligence into key aspects of your computing experience to make smarter, real-time optimizations. The MSI Center offers a clean, minimal interface to customize and manage your PC settings. The AI Engine, for example, automatically adjusts settings based on the applications you’re using, ensuring seamless performance.

ULTRA PERFORMANCE

Power Solution

Power Design

DIRECT 7+2+1 POWER DESIGN
Unleash and sustain the maximum performance with a VRM design built with a total of 7+2+1 digital power phases. With an 8-pin power connector, PRO B840M-B is ready for the challenge of heavy-loading tasks.

PCB Design

OPTIMIZED PCB SOLUTION
The PCB design has been optimized for higher bandwidth and faster transfer speeds, which is also beneficial for reliable circuit transmission.

• 6 PCB layers
• 2oz Thickened Copper

MORE FOR PERFORMANCE

1-SECOND OVERLOCKING

MSI Game Boost enables one-second overlocking, giving you the performance boost you need to get more FPS.

LOAD-LINE CALIBRATION

What you set, is what you get. LLC makes sure your CPU voltage remains 100% stable under any load. This greatly improves stability when demanding more CPU performance.

OVERVOLTAGE PROTECTION

Prevents potential short-circuit damage to the CPU and other critical components.

Memory

DDR5

DDR5 MEMORY SUPPORT WITH HIGH PERFORMANCE
A huge step of DDR performance enhancement with the latest DDR5 memory. Combines with dedicated SMT welding process and MSI Memory Boost technology, PRO B840M-B is ready to deliver the world-class memory performance.

• EXPO / A-XMP SUPPORT
• MEMORY BOOST
• SMT PROCESS

Heigh -Efficiency mode

The High-Efficiency Mode is designed to optimize memory performance byincreasing memory bandwidth and reducing latency. With the four sets of RAM timing settings, it allows users to find out the optimal configuration based on the quality of their memory modules.

Latency Killer

MSI BIOS has introduced the latest Latency Killer feature on all AM5 socket motherboards. Users can enable Latency Killer in the BIOS to reduce memory latency by up to 12% when running at high frequencies. Importantly, it is compatible with a wide range of memory overclocking features, including Memory Try It!!, EXPO, A-XMP, and High-Efficiency Mode, etc.

PROTECTION

TVS

Transient Voltage Suppressors (TVS)
Transient Voltage Suppressors (TVS) are safety devices used to protect against excessive voltage. All motherboard models of MSI are equipped with TVS. When the voltage abnormally rises, the TVS switches from a high-resistance state to a low-resistance state, diverting the excessive voltage to ground. This helps prevent circuit damage caused by high voltage.

Sold Pin Design

solid pin design
The 8-pin, and 24-pin power connectors of MSI motherboards are all designed with solid pins. The solid pin design allows for a more stable transmission of 12V power to the CPU, even when handling high current loads.

Advantages of Solid Pin Power connector

• Improved stability : Larger contact area enhances stability during power delivery.
• Low impedance : Solid pins offer low impedance, enabling efficient power flow.
• Strong durability : The solid pin design ensures strong durability, capable of withstanding demanding conditions.
• Suitable for high-current applications.

Stain less Steel IO

Anti-corrosive Stainless Steel IO Shield
Corrosive resistance IO Shield to help improve static electricity and reduce electromagnetic radiation noise from the system as well as more durable compare to traditional IO Shields.

OCP Protection

Over Current Protection
MSI motherboards prioritize safety with the embedded Overcurrent Protection (OCP), ensuring crucial components such as the USB ports, DDR memory, PWM IC, and CPU are shielded from excessive current. This proactive defense mechanism curtails the risk of damage or malfunction due to power surges, promoting long-term system stability. This commitment to safeguarding your hardware underscores MSI’s dedication to producing motherboards that prioritize durability and stability.

Grounding Structure

The Grounding Structure of Power Phases
The grounding structure of power phases is the MSI’s exclusive design. This patented design enables to suppress the electromagnetic interference (EMI) generated by the power phases and helps to efficiently conduct heat to the copper plane with grounding properties.

FROZR DESIGN

COOLING

Cooling Overview

FROZR SYNC

System Cooling

DIY 2.0 – INTEGRATING WITH THE SYSTEM ENVIRONMENT
Connect and synchronize with MSI coolers and cases with strategically positioned pin-header locations including a dedicated pump-fan header.

FROZR CONTROL

Cooling Wizard

Cooling Wizard serves as a comprehensive solution for managing fan settings across all MSI products. It ensures superior cooling performance and noise reduction for your gaming PC, offering compatibility with PWM/DC fans and pumps, customizable options, and intuitive temperature monitoring for optimal operation with one click.

Multiple Profile

Smart Fan& Manual Fan

• Smart Fan: Allow User to change the temperature curve with 4 dots provided.
• Manual Fan:   Allow user to  manually change the temperature at a set percentage

USER SCENIARIO

• Follow MSI Centre Mode:   Adjust fan according to the mode selected in user sceniario
• Bios Mode:   Adjust fan setting in BIOS
• Customize by user:   Customize fan setting by user.

FROZR AI COOLING

Frozr AI Cooling targets CPU and GPU temperatures. The AI system detects CPU and GPU temperatures and automatically adjusts the fan duty of system fans to ensure optimal performance.

AUTO DETECT FAN

MSI fan headers automatically detect fans running in DC or PWM mode for optimal tuning of fan speeds and silence. Hysteresis also makes your fans spin up fluently to make sure your system stays silent, no matter what.

TRILINK

networking

2.5G Lan

HIGH-BANDWIDTH AND LOW-LATENCY NETWORK
MSI’s premium network solution provides incredible data transfer speed for demanding users.

AI Lan Manager

MSI AI LAN Manager automatically classifies and prioritizes the latency-sensitive applications for online games, giving you the best online gaming experience with low latency.

• Automatically prioritizes games above other applications
• Allows to change applications’ traffic priority
• Allows to customize bandwidth for each application

STORAGE

FAST AND FUTURE-READY STORAGE
MSI PRO series motherboards support all the latest storage standards, which allows users to connect any ultra-fast storage device. Start games faster, load levels faster and have a real advantage over your enemies.

EXPANSION

Lightning GEN 4 PCI-E

Lightning Gen 4 PCI-e with Steel Armor

FRONT USB TYPE-C

MSI motherboards support USB Front Type-C that allows gamers to connect with the latest USB devices. Built up a system with MSI PC case to have the most convenient experience.

EXPERIENCE

AUDIO

AUDIO BOOST

• High definition Audio Processor
• High quality Audio capacitors
• High quality Audio Jacks
• Isolated Audio Signal
• DE-POP Protection

ISOLATED ANALOGY STRUCTURE

The Isolated Analogy Structure for Audio Connectors
To provide clear voice, MSI develops a unique structure – Isolated Analogy Structure. The external metal framework of the audio connectors is separated from the internal layout, which ensures the sound quality crisp.

MYSTIC LIGHT

GLOW YOUR PC
Splash on some color and vibrant RGB lighting effects using Mystic Light utility of MSI Center, which has million colors and fancy LED effects. Enjoy the full control and creativity of your PC’s lighting with one software.

SYNCHRONIZED

Add more color if you want! Mystic Light Extension pin header provides an intuitive way to control additional RGB strips and other RGB peripherals added to a system, without needing a separate RGB controller.

• A-RAINBOW V2:  Supports  5V addressable  RGB devices. Compatible with ARGB Gen 2/ Gen1  devices.
• RGB:  Support 12v RGB devices.
• AMBIENT LINK:    Synchronize lightening theme with compatible lightening devices.

BIOS

Click BIOS X

MSI’s newly designed CLICK BIOS X offers an aesthetically pleasing and user-friendly experience. The new design ensures that users of all experience levels can quickly access and adjust system configurations with ease.

BIOS KEY FEATURE

• AI BOOST:   Easily enhance your NPU performance with a click, unlocking the full potential of AI processing.
• EXPO/A-XMP:   Easily apply optimized  memory overclocking profile through a simple one-click activation.
• Hardware Monitor:   Instantly access real-time critical hardware information, including temperature, memory capacity, clock speed and voltage.
• M-Flash:   Easily flash or update a BIOS in just a few minutes directly from the CMOS setup utility.
• U-KEY:   Enable secure system access by requiring a specific USB drive for booting, adding an extra layer of security to your PC.
• Profile:   Save and Switch between multiple custom system configurations allowing for quick adjustments tailored to different tasks or performance need.
• Favorites: Bookmark frequently accessed settings, providing quick and easy access to essential configurations without the need to navigate through the entire menu.
• Search: Quickly locate specific settings or options by typing keywords, streamlining navigation and making system adjustments more efficient.

SOFTWARE

MSI CENTER

MSI brand new MSI Center unifies a suite of MSI software utilities into a single centralized application. Take control of advanced motherboards features and unleash endless possibilities.

AI ENGINE: MSI AI Engine eliminates the need to tweak settings manually and saving you time and effort.

MYSTIC LIGHT: Create your own colorful masterpiece with ease. Splash any color you want with just a few clicks.

True Color: Optimized monitor’s brightness and color in several modes for different situation, you can also customize by yourself.

USER SCENERIO: One Click for setting your computer, even customize own profile as your preference.

Hardware Monitoring: Get immediate access to your critical hardware information in real-time.

Cooling Wizard: Cooling Wizard is a comprehensive tool for managing fan settings across MSI products, offering one-click optimization.

System Diagnosis: Restore and backup your MSI storage devices in one click to provide stable system usage, you can even monitor the storage status to prevent system crash or data missing.

AIDA64

MSI motherboards provide 60 days free trial of AIDA64 Extreme – MSI edition. AIDA64 Extreme is an almighty application for system information, diagnostics and benchmarks. With the application, you can monitor the detailed hardware and software information on PC and save it to file in multiple formats such as CSV and HTML.

NORTON 360

Multiple layers of protection for your devices, online privacy features including our Secure VPN, plus Dark Web Monitoring – all in a single solution. With MSI motherboards, you can enjoy a 60-day free trial of Norton 360 Deluxe.

• Up to 50 GB PC cloud backup
• Real time Threat protection and Smart Firewall
• Password manager
• PC SafeCam

Chipset	AMD B840
CPU	Supports AMD Ryzen™ 9000/ 8000/ 7000 Series Desktop Processors Socket AM5
Memory	2x DDR5 UDIMM, Maximum Memory Capacity 128GB Memory Support DDR5 8000 – 5600 (OC) MT/s / 5600 – 4800 (JEDEC) MT/s Ryzen™ 9000 Series Processors max. overclocking frequency: • 1DPC 1R Max speed up to 8000+ MT/s • 1DPC 2R Max speed up to 7200+ MT/s Supports AMD POR Speed and JEDEC Speed Supports Memory Overclocking and AMD EXPOTM Supports Dual-Channel mode Supports Non-ECC, Un-buffered memory Supports CUDIMM, Clock Driver bypass mode only* * CUDIMM support and POR boot frequency may vary by CPU series, with manual overclocking available after boot. Certain CPUs may fail to boot, but future BIOS updates will improve compatibility. • The DIMM slots on this motherboard have single-sided latches. • Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product’s Support page or visit https://www.msi.com/support/.
Onboard Graphics	1x HDMI™ Support HDMITM 2.1, maximum resolution of 4K 60Hz* 1x VGA Support VGA, maximum resolution of 2048×1536 50Hz, 2048×1280 60Hz, 1920×1200 60Hz* *Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.
Slot	1x PCI-E x16 slot 1x PCI-E x1 slot PCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E1 slot • Supports PCIe 4.0 x16 (For Ryzen™ 9000/ 7000 Series processors) • Supports PCIe 4.0 x8 (For Ryzen™ 8700/ 8600/ 8400 Series processors) • Supports PCIe 4.0 x4 (For Ryzen™ 8500/ 8300 Series processors)
Audio	Realtek® ALC897 7.1-Channel High Definition Audio
Storage	2x M.2 M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices 4x SATA 6G M2_2 slot • Supports up to PCIe 4.0 x4 • Supports up to PCIe 4.0 x2 (For Ryzen™ 8500/ 8300 Series processors)
RAID	Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices Supports RAID 0 and RAID 1 for M.2 NVMe storage devices
USB	2x USB 2.0 (Rear) 4x USB 2.0 (Front) 4x USB 5Gbps Type A (Rear) 2x USB 5Gbps Type A (Front) 1x USB 5Gbps Type C (Front)
LAN	Realtek® 8125D 2.5G LAN
Internal IO	1x Power Connector(ATX_PWR) 1x Power Connector(CPU_PWR) 1x CPU Fan 2x System Fan 2x Front Panel (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 1x Com Port (JCOM) 3x Addressable V2 RGB LED connector (JARGB_V2) 1x RGB LED connector(JRGB) 1x TPM pin header(Support TPM 2.0) 4x USB 2.0 ports 2x USB 5Gbps Type A ports 1x USB 5Gbps Type C ports
LED FEATURE	4x EZ Debug LED 1x EZ Memory Detection LED
BACK PANEL PORTS	Clear CMOS Button HDMI™ VGA USB 5Gbps Type-A 2.5G LAN Audio connectors Flash BIOS Button USB 2.0
OPERATING SYSTEM	Support for Windows® 11 64-bit
BOX CONTENT
PCB Info	mATX 226mmx243.84mm