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Dark green micro-ATX board with black heatsinks and silver PCIe slots

MSI

MSI PRO B550M-P GEN3 AM4 AMD motherboard

SKU CH-MCTP-C4F85

Micro ATX board for AM4 Ryzen 3000 and 5000 CPUs with DDR4 up to 4400 MHz and PCIe Gen3 M.2 slot

  • ProcessorCPU5600X/5800X/5600G
  • CPU socketAM4
  • Supports Ryzen 5000 & 3000 desktop processors for strong multi-core performance
  • DDR4 memory up to 4400 MHz overclocked for faster data throughput
  • Turbo M.2 at PCI-E Gen3 x4 maximises NVMe SSD speed
  • Core Boost with Digital PWM and DDR4 Boost delivers stable power
  • Steel Armor protects graphics cards from bending and EMI

Socket AM4 foundation

The MSI PRO B550M-P GEN3 is a Micro ATX motherboard built for AMD Ryzen 5000 and 3000 Series desktop processors, plus Ryzen 4000 G-Series chips. It accepts CPUs such as the 5600X, 5800X and 5600G while excluding the 3400G and 3200G models. The board targets builders who want a compact platform for current-generation Ryzen without extra frills.

Turbo M.2 and DDR4 headroom

A single Turbo M.2 slot runs at PCI-E Gen3 x4 to deliver full speed for NVMe SSDs, while four DDR4 slots support memory clocks up to 4400 MHz when overclocked. Core Boost and Digital PWM IC provide stable power delivery, and DDR4 Boost isolates memory traces for cleaner signals. Steel Armor reinforces the primary PCIe slot to protect heavier graphics cards from flex and EMI.

Sustained-load behaviour

Under continuous workloads the Digital PWM IC and Core Boost circuitry maintain consistent voltage to the CPU, reducing throttling during long render or compile sessions. Audio Boost keeps analogue output clean even when the system draws steady power. MSI Center software lets you monitor temperatures and adjust fan curves so the platform stays composed during extended operation.

How it compares

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

Price $111.99
Cheaper than about 72% of the 1,906 comparable items (median $224.49).

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Specifications

Processor
ProcessorCPU5600X/5800X/5600G
CPU socketAM4

Questions about this item

What is the maximum DDR4 memory speed supported by this motherboard?

The board supports DDR4 memory up to 4400 MHz when overclocked.

How much heat or noise does the Core Boost power design generate during all-day use?

Core Boost uses a digital PWM IC to deliver efficient power with reduced heat output, keeping noise low under sustained loads.

Which AMD Ryzen processors are confirmed compatible with this AM4 socket board?

Compatible CPUs include Ryzen 5000 and 3000 series desktop processors such as the 5600X, 5800X, and 5600G, plus Ryzen 4000 G-Series. The 3400G and 3200G are not supported.

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