Specifications
| Brand | MSI |
| Model | B550-A PRO |
| Chipset | AMD B550 |
| CPU Socket | AM4 |
| Memory | 4 x DDR4 DIMM slots, up to 128 GB, supports DDR4 5400+ (OC) |
| Expansion Slots | 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16 (max x4), 2 x PCIe 3.0 x1 |
| Storage Interfaces | 2 x M.2 slots (PCIe 4.0 x4 & PCIe 3.0 x4), 6 x SATA 6 Gb/s |
| USB Ports | Rear: USB 3.2 Gen 2 Type‑A x2, USB 3.2 Gen 1 x2, USB 2.0 x2; Front header: USB 3.2 Gen 1 x2, USB 2.0 x2 |
| Audio | Realtek ALC892/897 7.1‑channel HD Audio |
| LAN | Realtek RTL8111H Gigabit Ethernet |
| Form Factor | ATX (12 in × 9.6 in) |
Key Features
- AMD B550 Chipset with AM4 Socket: Supports 3rd‑gen Ryzen CPUs for high‑performance builds.
- Robust Memory Support: Four DDR4 DIMM slots up to 128 GB, capable of DDR4 5400+ MHz (OC).
- PCIe 4.0 Expansion: One PCIe 4.0 x16 slot for next‑gen graphics cards and a secondary PCIe 3.0 x16 (max x4) slot.
- High‑Speed Storage: Dual M.2 slots (PCIe 4.0 x4 & PCIe 3.0 x4) plus six SATA 6 Gb/s ports for ample SSD/HDD capacity.
- Comprehensive USB Connectivity: Rear USB 3.2 Gen 2 Type‑A (x2), USB 3.2 Gen 1 (x2), USB 2.0 (x2); front‑panel headers for additional USB 3.2 Gen 1 and USB 2.0.
- 7.1‑Channel HD Audio: Realtek ALC892/897 codec delivers immersive sound.
- Gigabit Ethernet: Realtek RTL8111H provides reliable wired network connectivity.
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