# MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black

The MSI B550-A PRO delivers a rock-solid foundation for your AMD Ryzen build. This ATX motherboard supports PCIe 4.0 for lightning-fast graphics and NVMe storage, and features a robust 10+2 phase VRM with extended heatsinks for stable performance under load. With dual M.2 slots, six SATA ports, and a full suite of USB 3.2 Gen 2 connectivity, it offers generous expansion options. The convenient Flash BIOS button makes updating the firmware a breeze, even without a CPU installed. A reliable and feature-rich choice for both productivity and gaming systems.  
  

**CPU Socket:** AM4  
**Chipset:** AMD B550  
**Form Factor:** ATX  
**Memory Support:** 4 x DDR4, up to 128GB, 4400MHz (OC)  
**PCIe Slots:** 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16, 3 x PCIe 3.0 x1  
**Storage:** 1 x M.2 PCIe 4.0 x4, 1 x M.2 PCIe 3.0 x4, 6 x SATA 6Gb/s  
**USB Ports (Rear):** 1 x USB 3.2 Gen 2 Type-C, 1 x USB 3.2 Gen 2 Type-A, 2 x USB 3.2 Gen 1 Type-A, 2 x USB 2.0  
**Video Outputs:** 1 x HDMI 2.1, 1 x DisplayPort 1.2  
**Audio:** Realtek ALC892/897 7.1-Channel HD Audio  
**LAN:** Realtek RTL8111H Gigabit LAN

## Details

- **Price:** 229.95 CAD
- **Vendor:** MSI
- **Type:** Motherboard
- **Tags:** AM4 motherboard, AMD Ryzen motherboard, ATX motherboard, B550 motherboard, DDR4 motherboard, MSI B550-A PRO, MSI motherboard Canada, PCIe 4.0

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 229.95 CAD | In stock |

## Images

- MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black - OPCbleu
- MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black - OPCbleu
- MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black - OPCbleu
- MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black - OPCbleu
- MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black - OPCbleu
- MSI B550-A PRO ProSeries AMD AM4 ATX Motherboard - Black - OPCbleu

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> Source: [OPCbleu](https://opcbleu.ca/products/msi-b550-a-pro-proseries-amd-am4-atx-motherboard)
> Updated: 2026-07-27