MSI · MPN: PRO B840-S EVO WIFI6E
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Overview

  • Supports AMD Ryzen™ 9000 / 8000 / 7000 Series Desktop Processors
  • Supports DDR5 Memory, Dual Channel DDR5 8000+ MT/s (OC)
  • Ultra Performance: Direct 7+2+1 Power System with P-PAK, 8-pin CPU power connector, Core Boost, Memory Boost, 6-layer PCB made by 2oz thickened copper
  • Frozr Guard: MOSFET thermal pads rated for 7W/mK, M.2 Shield Frozr are built for high performance system and non-stop experience
  • EZ DIY: EZ M.2 Clip II, EZ PCIe Clip II, and EZ Antenna
  • Lightning Fast Game experience: PCIe 4.0 slot and Lightning Gen 4 x4 M.2
  • 2.5G LAN with Wi-Fi 6E Solution: the remarkable solution for professional and multimedia use, delivering secure, stable, and high-speed networking and data transmission
  • Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience

PRO B840-S EVO WIFI6E
PRO B840-S EVO WIFI6E offers a simple design with a harmonious color scheme that perfectly matches black PC builds. It is engineered with many exclusive features of MSI, a Wi-Fi 6E with EZ Antenna, 2.5G LAN, and PCIe 4.0 M.2 with M.2 Shield Frozr, ready for the AMD Ryzen™ 9000 series processors.

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.

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 B840-S EVO WIFI6E is ready for the challenge of heavy-loading tasks.

A huge step of DDR performance enhancement with the latest DDR5 memory. Combines with dedicated SMT welding process and MSI Memory Boost technology, PRO B840-S EVO WIFI6E is ready to deliver the world class memory performance.

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.

M.2 Shield Frozr
Strengthened M.2 thermal solution helps keep M.2 SSD safe and ensures incredible performance.

7W/mK Thermal Pad & Additional Choke Pad
High-quality 7W/mK MOSFET thermal pads and additional choke thermal pads ensure stable performance when all cores are runnging at high speed.

Enlarged Chipset Heatsink
The enlarged heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.

MSI's premium network solution provides incredible data transfer speed for demanding users.

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.

LIGHTNING GEN 4 PCI-E
MSI lightning Gen 4 PCI-E represents the bandwidth of a x16 interface to 64GB/s that has doubled compared to its previous generation.

REINFORCED,
HEAVY SOLDERED CONNECTIONS

MSI PCI Express Steel Armor slots are secured to the motherboard with extra solder points and support the weight of heavy graphics cards. When every advantage in games counts, Steel Armor shields the point of contact from electromagnetic interference.

REINFORCED,
HEAVY SOLDERED CONNECTIONS

MSI PCI Express Steel Armor slots are secured to the motherboard with extra solder points and support the weight of heavy graphics cards. When every advantage in games counts, Steel Armor shields the point of contact from electromagnetic interference.

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.

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.

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.

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.

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.

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.

Specifications

Processor

Supported processor socketsSocket AM5
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Processor socketSocket AM5
Processor manufacturerAMD

Memory

Maximum internal memory256 GB
Supported memory clock speed (max)8000 MHz
Supported memory clock speeds4800,5600,8000,6400 MHz
ECC сompatibilityNon-ECC
Memory channelsDual-channel
Memory slots typeDIMM
Number of memory slots4
Supported memory typesDDR5-SDRAM
Show all 57 specificationsShow fewer specifications

Storage controllers

RAID levels0, 1, 10
RAID supportYes
Number of storage drives supported7
Number of HDDs supported4
Supported storage drive interfacesM.2, Micro SATA III
Supported storage drive typesHDD & SSD

Graphics

On-board graphics cardNo
Parallel processing technology supportNot supported

Internal I/O

Number of RGB LED pin headers3
RGB LED pin headerYes
Number of water pump connectors1
Number of chassis fan connectors5
Number of CPU fan connectors1
Total number of SATA connectors4
Number of SATA III connectors4
USB 3.2 Gen 2 (3.1 Gen 2) connectors1
USB 3.2 Gen 1 (3.1 Gen 1) connectors2
USB 2.0 connectors4

Rear panel I/O ports

HDMI version2.1
HDMI ports quantity1
Ethernet LAN (RJ-45) ports1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity1
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
USB 2.0 ports quantity4

Features

Windows operating systems supportedWindows 11 x64
Product colourBlack
Audio output channels7.1 channels
Audio chipRealtek ALC897
Motherboard chipsetAMD B840
Motherboard chipset familyAMD
Motherboard form factorATX
Component forPC

Expansion slots

2nd M.2 highest PCI Express generation4.0
2nd M.2 largest key size22110
1st M.2 highest PCI Express generation4.0
1st M.2 largest key size2280
Number of M.2 (M) slots2
PCI Express x16 (Gen 3.x) slots4
PCI Express x16 (Gen 4.x) slots1

BIOS

System Management BIOS (SMBIOS) version3.7
ACPI version6.5
BIOS typeUEFI AMI

Weight & dimensions

Depth304.8 mm
Width243.8 mm

Videos

MSI Mystic LightRGB Lighting
MSI Mystic LightRGB Lighting

Manuals & downloads

Delivery & returns

Delivery

  • FREE standard delivery on orders over £50, otherwise £4.95 (3–5 working days).
  • Express delivery £9.99 (1–3 working days) on selected products, UK mainland.
  • PlayStation and Arozzi products use a 5–7 working-day service.
  • Orders are processed within 24 hours, Monday to Friday excluding bank holidays. All deliveries must be signed for.

Returns

  • Changed your mind? Tell us within 14 days of receiving your item, then return it within a further 14 days, unused and in its original packaging. A minimum £9.99 collection fee applies.
  • Faulty or damaged on arrival? Contact us within 48 hours of delivery.
  • Custom-built PCs can only be returned if faulty. Opened headphones, earphones and AirPods can't be returned for hygiene reasons.

Full delivery information · Full returns policy