# Motherboard MSI B550-A PRO, AMD B550 Chipset, AM4 Socket, ATX

**URL:** https://aio.lv/en/product--msi-b550-a-proso--11568882
**Data updated:** 2026-01-12 19:35 (EET)
**Category:** Motherboards
**Manufacturer:** MSI
**Manufacturer code:** B550-A PROSO
**EAN:** 2000001383698
**Warranty:** 3 Months
**Availability:** Out of stock

## Summary description

The MSI B550-A PRO motherboard features an AMD B550 chipset, AM4 socket, and supports up to 4 DDR4 DIMM memory slots. It includes 6 SATA connectors and M.2 interfaces for storage. This ATX motherboard is ideal for building a reliable system for gaming or productivity. It is used and refurbished, with only the back panel included.

## Long description

The MSI B550-A PRO motherboard features the AMD B550 chipset and an AM4 socket in an ATX form factor, offering a platform for building desktop systems focused on reliability and compatibility. It supports up to four DDR4 DIMM memory slots and provides multiple storage options through six SATA connectors and M.2 interfaces. This unit is a used, refurbished board and is supplied with the back panel only.
Advantages
The combination of the AMD B550 chipset and AM4 socket ensures compatibility with a range of Ryzen processors, allowing flexible CPU upgrades within the AM4 ecosystem. The ATX layout provides standard expansion capabilities for additional cards and cooling solutions. With four DDR4 DIMM slots, the board supports multi-module memory configurations, while six SATA connectors and M.2 interfaces allow installation of several drives for boot, cache, and mass storage. As a refurbished product, it offers reduced cost compared with new units while having been tested for basic functionality; the package includes the back panel.
Suitable for (tasks / use cases)
Building or upgrading a desktop PC for general productivity tasks
Entry to mid-level gaming builds where AM4 CPU support and multiple storage devices are needed
Home or small office workstations that require standard ATX expansion and multiple drives
Repair or replacement of an existing ATX motherboard with AMD B550 chipset
Key specifications
Brand: MSI
Model: B550-A PRO (MPN: B550-A PROSO)
Chipset: AMD B550
CPU socket: AM4
Form factor: ATX
Memory: Up to 4 x DDR4 DIMM slots
Storage interfaces: 6 x SATA connectors; M.2 interfaces
Condition: Used, refurbished; back panel included
EAN: 2000001383698
How to use
Install the motherboard into a compatible ATX case using the standard standoffs and mounting screws. Fit an AM4-compatible CPU and apply thermal interface material before attaching a supported cooler. Populate DDR4 memory modules into the DIMM slots according to the motherboard manual for optimal channel configuration. Connect storage devices to the six SATA ports or to available M.2 slots, and attach power from a compatible PSU to the 24-pin ATX and CPU power connectors. Install any required graphics or expansion cards into PCIe slots and connect front-panel headers, USB, and audio as needed. After assembling hardware, enter the BIOS/UEFI to verify device recognition and configure boot order and memory settings.
Usage recommendations
Ensure compatibility of the chosen AM4 CPU and DDR4 memory modules with the MSI B550-A PRO by consulting official CPU and memory support lists. Use properly rated power supplies and adequate cooling. Because this is a refurbished unit supplied with only the back panel, confirm you have or source any additional cables, screws, or accessories needed for installation.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All MSI products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized MSI service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

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