| Processor manufacturer | AMD |
| Processor socket | Socket AM4 |
| Compatible processor series | 3rd Generation AMD Ryzen™ 3, 3rd Generation AMD Ryzen 5, 3rd Generation AMD Ryzen™ 7, 3rd Generation AMD Ryzen™ 9 |
| Maximum number of SMP processors | 1 |
| Supported memory types | DDR4-SDRAM |
| Number of memory slots | 4 |
| Maximum internal memory | 128 GB |
| Memory slots type | DIMM |
| Memory channels | Dual-channel |
| ECC | Yes |
| Non-ECC | Yes |
| Supported memory clock speeds | 1866,2133,2400,2667,2800,2933,3000,3066,3200,3466,3600,3733,3866,4000,4133,4266,4400,4800 MHz |
| Supported storage drive interfaces | SATA III |
| Supported storage drive types | HDD & SSD |
| RAID levels | 0, 1, 10 |
| Parallel processing technology support | 2-Way CrossFireX |
| Maximum graphics card memory | 16000 MB |
| Maximum resolution | 4096 x 2160 pixels |
| USB 2.0 connectors | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| Number of SATA III connectors | 6 |
| Front panel audio connector | Yes |
| ATX Power connector (24-pin) | Yes |
| CPU fan connector | Yes |
| Number of chassis fan connectors | 6 |
| Chassis intrusion connector | Yes |
| TPM connector | Yes |
| 12V power connector | Yes |
| RGB LED pin header | Yes |
| USB 2.0 ports quantity | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| HDMI ports quantity | 1 |
| PS/2 ports quantity | 1 |
| DisplayPorts quantity | 1 |
| Wi-Fi | No |
| Ethernet LAN | Yes |
| Ethernet interface type | Gigabit Ethernet |
| LAN controller | Realtek 8111H |
| Component for | PC |
| Motherboard form factor | ATX |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| Audio output channels | 7.1 channels |
| Audio chip | Realtek ALC892 |
| Number of mounting holes | 9 |
| PCI Express x1 (Gen 3.x) slots | 2 |
| PCI Express x16 (Gen 3.x) slots | 1 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| Number of M.2 (M) slots | 2 |
| Clear CMOS jumper | Yes |
| Harmonized System (HS) code | 84733020 |
| Width | 305 mm |
| Depth | 244 mm |
| Height | 65 mm |
| Cables included | SATA |
| Drivers included | Yes |
| Weight | 1 kg |
| Description |
| MSI B550-A PRO. Processor manufacturer: AMD, Processor socket: Socket AM4, Compatible processor series: 3rd Generation AMD Ryzen™ 3, 3rd Generation AMD Ryzen 5, 3rd Generation AMD Ryzen™ 7, 3rd.... Supported memory types: DDR4-SDRAM, Maximum internal memory: 128 GB, Memory slots type: DIMM. Supported storage drive interfaces: SATA III, Supported storage drive types: HDD & SSD, RAID levels: 0, 1, 10. Parallel processing technology support: 2-Way CrossFireX, Maximum graphics card memory: 16000 MB, Maximum resolution: 4096 x 2160 pixels. Ethernet interface type: Gigabit Ethernet, LAN controller: Realtek 8111H |
