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ATX motherboard with black heatsinks and silver M.2 shields

MSI

MSI B550 GAMING WIFI6E AMD motherboard

SKU CH-986M-1GMG6 MPN B550 GAMING WIFI6E

ATX board for Ryzen 5000 and 3000 CPUs with dual PCIe 4.0 M.2 slots, Wi-Fi 6E and DDR4 up to 128 GB

  • ProcessorRyzen 5000 Series, Ryzen 4000 G-Series, Ryzen 3000 Series
  • ChipsetAMD B550
  • Form factorATX
  • CPU socketAM4
  • South bridgeAMD B550
  • Memory slot count4 × 288pin (DDR4)

Model B550 GAMING WIFI6E

  • Supports Ryzen 5000, 4000 G-Series and 3000 Series CPUs
  • 128GB DDR4 capacity across four 288-pin slots
  • PCIe 4.0 x16 slot delivers up to 64GB/s bandwidth
  • Dual M.2 connectors with one PCIe 4.0 and M.2 Shield Frozr
  • Wi-Fi 6E and 1G LAN for fast wired and wireless networking

Ready for Ryzen 5000 builds

This ATX motherboard uses the AMD B550 chipset and AM4 socket to support Ryzen 5000, 4000 G-Series and 3000 Series desktop processors. It provides four DDR4 slots for up to 128GB of dual-channel memory running at 3200 MT/s with XMP profiles. Integrated Wi-Fi 6E and 1G LAN handle networking without extra cards.

Verify CPU cooler clearance and PSU cables

The board requires an 8-pin EPS connector for its 8 Duet Rail DrMOS 50A power delivery plus a 24-pin ATX main supply. Confirm your case has enough height for the extended heatsink covering the VRM area and that the CPU fan header rated at 2A matches your cooler. Two full-length PCIe x16 slots share bandwidth so check your graphics card fits the primary PCIe 4.0 x16 lane.

Steel-reinforced slots and shielded M.2

The primary PCIe 4.0 x16 slot uses Steel Armour reinforcement for heavy graphics cards while the secondary runs at PCIe 3.0 x16. Two M.2 sockets accept PCIe 4.0 x4 or SATA drives; the top slot includes M.2 Shield Frozr for thermal management. Six SATA 6Gb/s ports and multiple fan headers with Frozr Sync support complete the rear and internal connectivity.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $88.99
Cheaper than about 80% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMSI
Product lineGAMING
Processor
ProcessorRyzen 5000 Series, Ryzen 4000 G-Series, Ryzen 3000 Series
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryDDR4 3200
Max supported RAM128 GB
Memory channelsDual Channel
Memory profilesIntel XMP
ECC supportYes
BufferingUn-buffered
Storage
SATA ports6 x SATA 6Gb/s
M.2 slots2 x M.2 (Support PCIe 4.0 x4 & SATA)
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8111H
Maximum network speed1 Gbit/s
Wi-Fi standardWiFi IEEE 802.11 a / b / g / n / ac / ax
Bluetooth supportYes
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16
PCIe 3.0 x16 slots1 x PCI Express 3.0 x16
PCIe x16 slots2 x PCI Express x16
PCIe x4 slots1 x PCI Express x4
PCIe x1 slots1 x PCI Express x1
Serial ports1
Video connectorsHDMI + Display Port
HDMI ports1 x HDMI
Ethernet port1 x RJ45
DisplayPort connectors1 x DisplayPort
USB 3.1 ports4 x USB 3.1
USB 3.0 ports6 x USB 3.0
USB 2.0 ports8 x USB 2.0
USB-C ports1 x USB 5 Gbit/s Type C port, 1 x USB 10 Gbit/s Type C port
Onboard USB headers3 x USB 3.2 + 4 x USB 2.0
Size & build
Form factorATX
Width and length243.84 mm × 304.8 mm
Shipping weight1.54 kg
Package size347 × 273 × 72 mm
Compatibility
Windows 11 supportSupported
More details
South bridgeAMD B550
LightingRGB

Other versions of this model

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Questions about this item

What comes in the box with the MSI B550 GAMING WIFI6E and what must I buy separately?

The motherboard is supplied as the main unit; you will need to purchase an AM4 processor, DDR4 memory modules, storage drives, a power supply, a case and a CPU cooler separately.

Which memory capacity should I choose for the four DDR4 slots on this board?

The board supports up to 128GB across four slots; populate all four with 32GB modules for maximum capacity or use two 16GB modules for 32GB in dual-channel mode.

What does the 64GB/s PCIe 4.0 x16 bandwidth mean for a graphics card installed in the top slot?

The primary x16 slot runs at PCIe 4.0 speeds, delivering up to 64GB/s of bandwidth so a modern GPU can transfer data without a bottleneck.

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