The MSI PRO A520M-S is a compact Micro ATX motherboard for AM4, aimed at stable budget and mid-range Ryzen configurations. It is based on the AMD A520 chipset and supports a wide range of processors – from the Ryzen 3000 to 5000 series, including G-Series with integrated graphics. You get modern storage options with 1x M.2 (PCIe 3.0 x4 / SATA) and 4x SATA 6Gb/s, plus basic but adequate network and audio connectivity for everyday gaming and work. The Micro ATX form factor allows you to build a compact machine without sacrificing essential expansion.

What you get

The AM4 socket and AMD A520 chipset provide compatibility with AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series, 3000 Series, and 3000 G-Series – convenient if you are thinking about upgrades or reusing an old CPU. The two DDR4 slots support up to 64 GB RAM and a wide frequency range up to 4600 MHz. The M.2 (PCIe 3.0 x4 / SATA) slot is for the system, and several SATA drives for games, projects, or archives, while RAID 0/1/10 gives you flexibility between speed and reliability. The built-in Realtek RTL8111H 1Gbps network covers online gaming and streaming without issues, and the Realtek ALC897 provides decent audio for headphones or budget speakers. The expansion slots PCIe 3.0 x16 and PCIe 3.0 x1 allow you to add a discrete GPU and one more card – sound, network, or capture card, if needed.

The AM4 socket and AMD A520 chipset ensure compatibility with modern Ryzen processors from the 3000 to 5000 series, including G-Series variants.
Two DDR4 memory slots with support for up to 64 GB RAM and frequencies up to 4600 MHz provide a good foundation for gaming and multitasking.
One M.2 (PCIe 3.0 x4 / SATA, 2280/2260) slot allows you to use a fast NVMe or SATA SSD for the operating system and key applications.
4x SATA 6Gb/s ports with support for RAID 0, RAID 1, RAID 10 allow flexible HDD/SSD configuration for speed or mirroring.
The built-in Realtek ALC897 audio offers decent quality for games, movies, and voice chat without the need for a separate sound card.
The Realtek RTL8111H 1Gbps network controller provides stable gigabit LAN for online gaming and fast network transfers.
The Micro ATX form factor and standard power connectors 1x ATX_PWR, 1x CPU_PWR facilitate assembly in compact cases with standard ATX power supplies.

Who it is suitable for

This motherboard is suitable for budget and mid-range Ryzen builds – office/school PC, entry-level gaming machine, or home media/work computer. It is also suitable if you want a compact Micro ATX configuration with one GPU and a few drives, without extra features like Wi-Fi and multiple PCIe slots. It is not the best choice if you are looking for extreme expansion with many cards or enthusiast overclocking and tons of additional features.

The balance between AM4 support, a fast M.2 slot, RAID capabilities, and the compact Micro ATX format makes the MSI PRO A520M-S a practical foundation for a sensible, well-thought-out build.