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Rectangular ATX motherboard with black PCB, silver heatsinks and four DDR5 slots

MSI

MSI B840 GAMING PLUS WIFI AMD motherboard

SKU CH-8A61-1JW25 MPN B840 GAMING PLUS WIFI

ATX board for AM5 Ryzen 7000, 8000 and 9000 CPUs with DDR5 up to 8000 MT/s, PCIe 4.0 x16, dual M.2 Gen4, Wi-Fi 7, 2.5G LAN and Bluetooth 5.4

  • CPU Socket TypeAM5
  • CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B840
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to 8000+ MT/s (OC)
  • Maximum Memory Supported256GB

Option B840 GAMING PLUS WIFI

Les versions barrées existent, mais ne sont pas disponibles ici.

  • Supports Ryzen 7000 8000 9000 series processors on AM5 socket
  • DDR5 memory up to 8000+ MT/s overclocking with four 288-pin slots
  • Wi-Fi 7 with 320MHz channel reaching 5.8Gbps maximum speed
  • Two M.2 slots with PCIe 4.0 x4 for 64GB/s bandwidth
  • 5Gbps LAN plus Bluetooth 5.4 for fast wired and wireless connectivity

Socket AM5 DDR5 platform

This ATX board pairs the AMD B840 chipset with an AM5 socket for Ryzen 7000, 8000 and 9000 series processors. Four DDR5 slots accept up to 256 GB running at 8000+ MT/s overclocked. One PCIe 4.0 x16 slot, one PCIe 3.0 x16 slot and three PCIe 3.0 x1 slots handle graphics and add-in cards. Two M.2 sockets support PCIe 4.0 x4 storage.

Check CPU cooler clearance and PSU cables

Verify that your AM5 cooler mounting hardware matches the socket pattern. Ensure the power supply provides an 8-pin EPS connector for the CPU and a 24-pin ATX connector for the board. Confirm the case has room for a full-size ATX motherboard and that front-panel headers align with the onboard USB 3.2 Gen 1, USB 2.0 and audio connectors.

Thermals noise and power draw

Extended PWM heatsinks spread heat from the voltage regulators during sustained loads. The EZ M.2 Shield Frozr II covers both M.2 drives without tools, helping keep storage temperatures steady. A 2.5 Gbps LAN port and Wi-Fi 7 with 320 MHz channels add minimal extra heat. Fan headers let you tune curves for quiet operation at idle and stronger airflow under load.

Points forts

  • Supports Ryzen 7000 8000 9000 series processors on AM5 socket
  • DDR5 memory up to 8000+ MT/s overclocking with four 288-pin slots
  • Wi-Fi 7 with 320MHz channel reaching 5.8Gbps maximum speed
  • Two M.2 slots with PCIe 4.0 x4 for 64GB/s bandwidth
  • 5Gbps LAN plus Bluetooth 5.4 for fast wired and wireless connectivity

Caractéristiques

BrandMSI
ModelB840 GAMING PLUS WIFI
CPU Socket TypeAM5
CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
ChipsetAMD B840
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to 8000+ MT/s (OC)
Maximum Memory Supported256GB
Channel SupportedDual Channel
PCI Express 4.0 x161 x PCI Express 4.0 x16
PCI Express 3.0 x161 x PCI Express 3.0 x16
PCI Express x13 x PCI Express 3.0 x1
Serial ATA (SATA)4 x SATA 6Gb/s
M.22 x M.2 (Support PCIe 4.0 x4)
Audio ChipsetRealtek ALC897
Audio Channels8 Channels
LAN ChipsetRealtek 8125D
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports1 x Clear CMOS Button / 1 x Flash BIOS Button / 1 x HDMI / 1 x LAN (RJ45) / 1 x USB 3.2 Gen 2 Type-A / 2 x Antenna Bracket / 2 x USB 3.2 Gen 1 Type-A / 3 x Audio Jacks / 4 x USB 2.0/1.1
Form FactorATX
Poids d’expédition1.61 kg
Dimensions du colis342 × 268 × 70 mm

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Questions sur cet article

Does the MSI B840 GAMING PLUS WIFI include mounting screws for the two M.2 slots, or must they be purchased separately?

The board uses a tool-less EZ M.2 Shield Frozr II design that secures M.2 drives without separate screws. Standard ATX case standoffs and I/O shield are required but not supplied.

With four DDR5 slots supporting up to 8000+ MT/s (OC), which memory configuration gives the best balance of capacity and speed?

Populating two slots with a matched DDR5 kit lets the memory controller reach the highest overclocked frequencies; filling all four slots to 256 GB typically lowers the stable MT/s.

The product page quotes a Wi-Fi 7 peak of 5.8 Gbps — what throughput should I expect when the router is one room away?

Real-world throughput depends on channel width, interference and client capability; the 320 MHz channel and 2.5 Gbps LAN port ensure the wired link will not bottleneck the wireless connection.

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