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Black ATX motherboard with silver heatsinks and four DDR4 slots

MSI

MSI MPG B550 GAMING PLUS AMD motherboard

SKU CH-33TE-BCPTH MPN MPG B550 GAMING PLUS

ATX board for AM4 Ryzen CPUs with PCIe 4.0 graphics and M.2, four DDR4 slots up to 128 GB, 7.1 audio and dual video outputs

  • ProcessorSupports AM4 socket 3rd Gen AMD Ryzen processors, and future
  • ChipsetAMD B550
  • Form factorATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memorySupports DDR4 4400+/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 346
  • Supports 3rd Gen Ryzen and future CPUs with BIOS update
  • DDR4 memory up to 4400 MHz via A-XMP OC MODE
  • PCIe 4.0 x16 slot and M.2_1 for fast GPU and storage
  • Dual M.2 slots with 2242 to 22110 support
  • Realtek ALC892 7.1-channel audio with S/PDIF output

Ryzen AM4 platform ready

This ATX motherboard uses the AMD B550 chipset and the AM4 socket to support 3rd Gen Ryzen CPUs and future Ryzen processors with a BIOS update. It targets builders who want a mainstream platform with PCIe 4.0 graphics and storage support.

VRM heatsinks and fan headers manage thermals

Extended heatsinks cover the power delivery for stable operation under load. Multiple fan headers let the builder tune airflow for quiet daily use or higher performance when needed. The Realtek RTL8111H LAN controller adds minimal power draw.

Dual M.2 slots and six SATA ports for storage

The primary M.2 slot runs at PCIe 4.0 x4 from the CPU and accepts 2242, 2260, 2280 and 22110 drives. The second M.2 slot runs at PCIe 3.0 x4 from the chipset. Six SATA 6Gb/s ports with RAID 0, 1, 10 round out the storage options.

How it compares

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

Price $103.99
Cheaper than about 75% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model nameMPG B550 GAMING PLUS
Processor
ProcessorSupports AM4 socket 3rd Gen AMD Ryzen processors, and future AMD Ryzen processors with BIOS update
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memorySupports DDR4 4400+/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE
Supports DDR4 3200/ 3066/ 3000/ 2933/ 2800/ 2667/ 2400/ 2133/ 1866 MHz by JEDEC
1DPC 1R max speed 4400 MHz
1DPC 2R max speed 3866 MHz
2DPC 1R max speed 4000 MHz
2DPC 2R max speed 3600 MHz
Max supported RAM128 GB
Memory channelsDual Channel
Storage
SATA ports6 x SATA 6Gb/s
M.2 slots2 x M.2 slots (Key M)
M2_1 slot (from AMD Processor)
Supports PCIe 4.0/3.0 x4 *
Supports SATA 6Gb/s
Supports 2242/2260/2280/22110 storage devices
M2_2 slot (from AMD B550 chipset)
Supports PCIe 3.0 x4
Supports 2242/2260/2280 storage devices
* The supported specification depends on installed processor.
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC892
Sound channels7.1-Channel High Definition Audio
Supports S/PDIF output
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Ports & slots
PCIe 4.0 x16 slots1 x PCIe 4.0/3.0 x16 slot (PCI_E1) *
* The supported specification depends on installed processor.
PCIe 3.0 x16 slots1 x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed **
** When installing PCIe SSD in M.2_2, PCI_E3 slot will be unavailable.
PCIe x16 slots1 x PCI Express x16
PCIe x1 slots2 x PCIe 3.0 x1 slots
Rear panel ports4 x USB 3.1 Gen 1
USB 3.0 ports4 x USB 3.0
Onboard USB headers1 x USB 3.2 Gen 1 5 Gbit/s Type-C port
1 x USB 3.2 Gen 1 5 Gbit/s connector (supports additional 2 USB 3.2 Gen 1 5 Gbit/s ports)
2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
Power
Power connectors1 × 24-pin ATX main power connector
1 × 8-pin ATX 12 V power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight1.77 kg
Package size348 × 269 × 86 mm
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

How do I install the motherboard in an ATX case, and what step is often missed?

Mount the board using all nine ATX standoffs, connect the 24-pin ATX and 8-pin EPS power cables, then update the BIOS before installing a 3rd Gen Ryzen CPU so the processor is recognised.

What maintenance or replacement will the board need later?

The CMOS battery that preserves BIOS settings and the real-time clock will eventually need replacement, and dust should be cleared from the VRM heatsinks and chipset heatsink to maintain thermal performance.

What limit appears first under sustained heavy load?

The VRM and chipset heatsinks are the primary thermal limit; if they saturate, the board will throttle the CPU to protect itself.

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