MSI B840M GAMING PLUS WIFI6E M-ATX AM5 AMD B840 Chipset — Supports Ryzen 9000/8000/7000 Series, 4x DDR5 up to 256GB 8000+ MHz, PCIe 4.0 x16, 2x M.2 Gen4, 4x SATA, Wi-Fi 6E, 2.5G LAN, USB-C 10Gbps, HDMI 2.1, Enhanced Cooling, Audio Boost, Frozr AI

General Information

The MSI B840M GAMING PLUS WIFI6E is a high-performance micro-ATX motherboard designed for AMD Ryzen™ 9000, 8000, and 7000 series desktop processors. It features DDR5 memory support, PCIe 4.0 x16 slot, and Wi-Fi 6E, making it ideal for gaming, content creation, and high-end desktop use.

CPU & Socket

• CPU Support:
  • AMD Ryzen™ 9000, 8000, 7000 Series Desktop Processors
• Socket: AM5 – supports future AMD processors
• Chipset: AMD B840 – mid-range chipset with PCIe 4.0 support

Memory

• Slots: 4 x DDR5 UDIMM
• Max Capacity: 256GB
• Speeds:
  • OC: Up to 8000+ MT/s (1DPC 1R), 6400+ MT/s (1DPC 2R/2DPC 1R), 5600+ MT/s (2DPC 2R)
  • JEDEC: 5600 - 4800 MT/s
• Features:
  • Dual-Channel mode
  • AMD EXPO™ support for easy overclocking
  • Supports Non-ECC, Un-buffered memory
  • CUDIMM support (Clock Driver bypass mode)

Graphics

• Integrated Graphics Support:
  • HDMI™ 2.1 – up to 4K @ 60Hz
• Note: Requires a CPU with integrated graphics.

Expansion Slots

• PCI_E1:
  • PCIe 4.0 x16 (From CPU)
  • Supports x16 (Ryzen 9000/7000), x8 (Ryzen 8700/8600/8400), x4 (Ryzen 8500/8300)
• PCI_E2:
  • PCIe 3.0 x1 (From Chipset)

Storage

• M.2 Slots:
  • M.2_1: PCIe 4.0 x4, supports 2280/2260
  • M.2_2: PCIe 4.0 x4, supports 2280/2260
• SATA Ports:
  • 4 x SATA 6Gbps
• RAID Support:
  • RAID 0, 1, 10 for SATA storage devices
  • RAID 0, 1 for M.2 NVMe storage devices

Audio

• Codec: Realtek® ALC897
• Channels: 7.1-Channel High Definition Audio
• Features:
  • Audio Boost – enhanced audio quality
  • Gold-plated audio jacks
  • Premium audio capacitors

Networking

• Ethernet:
  • Realtek® 8125D 2.5G LAN – fast and reliable wired connection
• Wireless & Bluetooth:
  • Wi-Fi 6E – 2.4GHz / 5GHz / 6GHz bands, up to 2.4Gbps
  • Bluetooth® 5.3 – low-energy connectivity
  • MU-MIMO TX/RX – improved wireless performance

USB Ports

• Rear I/O:
  • 2 x USB 5Gbps (Type-A)
  • 1 x USB 10Gbps (Type-A)
  • 1 x USB 10Gbps (Type-C)
  • 4 x USB 2.0 (Type-A)
• Front Panel Headers:
  • 2 x USB 5Gbps (Type-A)
  • 1 x USB 5Gbps (Type-C)
  • 4 x USB 2.0

Internal I/O Connectors

• Power:
  • 1 x ATX 24-pin
  • 1 x CPU 8-pin
• Fan Headers:
  • 1 x CPU Fan
  • 1 x Combo Fan (Pump_Sys Fan)
  • 3 x System Fan
• RGB Headers:
  • 3 x Addressable Gen2 RGB (JARGB_V2)
  • 1 x Standard RGB (JRGB)
• Other:
  • 1 x TPM 2.0 header
  • 1 x Front Audio (JAUD)
  • 1 x Chassis Intrusion (JCI)
  • 1 x Tuning Controller connector (JDASH)

Back Panel I/O

• 1 x HDMI™ 2.1
• 2 x USB 5Gbps (Type-A)
• 1 x USB 10Gbps (Type-A)
• 1 x USB 10Gbps (Type-C)
• 4 x USB 2.0 (Type-A)
• 1 x 2.5G LAN port
• 2 x Antenna connectors (for Wi-Fi 6E)

Special Features

• Enhanced Cooling:
  • Frozr AI – intelligent fan control for optimal cooling
  • M.2 Heatsink – keeps M.2 SSDs cool under heavy loads
• EZ Debug LEDs:
  • 4 x EZ Debug LED for troubleshooting
  • 1 x EZ Memory Detection LED
• Q-Design Features:
  • M.2 Q-Latch – tool-less M.2 installation
  • EZ-Connector – simplified cable routing
• MSI Center Software:
  • For system monitoring, overclocking, and RGB control

Operating System

• Support: Windows® 11 64-bit

Box Contents

• 1 x MSI B840M GAMING PLUS WIFI6E Motherboard
• 1 x Quick Start Guide
• 1 x SATA 6Gbps cable
• 1 x Wi-Fi antenna set