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MSI PRO B840M-B AM5 DDR5 MATX Motherboard
The MSI PRO B840M-B AM5 DDR5 MATX motherboard delivers exceptional performance for gamers and creators alike. With support for latest AMD Ryzen processors and DDR5 memory, it ensures rapid data transfer and enhanced stability. Featuring multiple PCIe slots, USB 3.2 connectivity, and advanced thermal solutions, this board guarantees a seamless computing experience.
Features


General
SKU | 003-MSI-B55 |
Features
Brand | MSI |
Model Number | MSI PRO B840M-B AM5 DDR5 MATX Motherboard |
Key Features |
Supports AMD AM5 processors DDR5 memory support for enhanced performance Micro ATX form factor for compact builds Dual M.2 slots for high-speed SSDs USB 3.2 Gen 2 ports for fast data transfer 1 Gigabit LAN for stable network connectivity HDMI and DisplayPort outputs for flexible display options Enhanced audio with high-definition audio codec Easy BIOS update feature Comprehensive cooling solutions for efficient thermal management |
Description
MSI PRO B840M-B AM5 DDR5 MATX Motherboard
MSI PRO B840M-B AM5 DDR5 MATX Motherboard
Designed for those seeking exceptional performance and reliability, the MSI PRO B840M-B AM5 DDR5 MATX Motherboard is a robust foundation for your next build. Offering outstanding compatibility and advanced features, this motherboard is tailor-made for both gamers and professionals alike.
Equipped with the latest AM5 socket, the PRO B840M-B supports AMD Ryzen 7000 Series processors, harnessing cutting-edge processing power for seamless multitasking and intense gaming sessions. Paired with DDR5 memory support, this motherboard ensures fast data transfer rates and improved efficiency, allowing your system to run smoothly even under heavy loads.
The MATX form factor makes it an ideal choice for compact builds, while still providing ample expansion options. Features like PCIe 5.0 slots offer enhanced bandwidth for graphics cards and other peripherals, ensuring future-proofing for your system. Whether you're adding a high-performance GPU or additional SSDs, this motherboard accommodates your ever-evolving needs.
Connectivity is a strong suit of the MSI PRO B840M-B. Multiple USB ports, including USB 3.2 Gen 2, facilitate quick data transfers and effortless connectivity with your devices. The inclusion of HDMI and DisplayPort outputs ensures you can easily connect your display, offering high-quality visuals for gaming or professional content creation.
This motherboard also prioritises audio quality with its high-definition audio codecs, bringing rich and immersive sound to enhance your entertainment experience. Gaming and media consumption are taken to the next level, allowing you to enjoy surround sound and clarity in your audio without compromise.
The MSI PRO B840M-B features comprehensive cooling solutions. With multiple fan headers and an intuitive BIOS to optimise thermal performance, you can keep your system running efficiently and quietly. No more overheating issues; expect reliable performance even during the most demanding tasks.
Durability is paramount, and MSI ensures that this motherboard meets high standards. With reinforced PCIe slots and high-quality capacitors, the PRO B840M-B is built to withstand the rigours of regular use, providing a stable and dependable platform for years to come.
Customize your experience further with MSI's Dragon Centre software. Tailoring performance settings and monitoring hardware health has never been easier, giving users the control they need to optimise their build. Whether utilising for gaming, streaming, or productivity, this feature allows for a personalised approach.
With its blend of performance, connectivity, and durability, the MSI PRO B840M-B AM5 DDR5 MATX Motherboard is an investment in your computing future. Whether you aim to build a gaming rig, a professional workstation, or a versatile home system, this motherboard provides the perfect foundation to enhance any computing experience.
Embrace innovation and reliability with the MSI PRO B840M-B—perfect for those who refuse to compromise on performance.
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Specification
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 2048x1536 50Hz, 2048x1280 60Hz, 1920x1200 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