The ASRock B550 Steel Legend wins in 6 out of 13 comparable specs. Its biggest advantage is PCIe x16 Slots (100% better).
PRO B850M-A WIFI wins in 3 specs (Max Memory: 100% better).
Recommendation
Choose B550 Steel Legend if you want the best overall performance — especially pcie x16 slots.
Choose PRO B850M-A WIFI if max memory matters more to you.
| Spec | ASRockB550 Steel Legend | MSIPRO B850M-A WIFI |
|---|---|---|
| Platform | ||
| Socket | AM4 | AM5 |
| Chipset | B550 | B850 |
| Form Factor | ATX | Micro ATX |
| PCIe Gen | 4 | 5+25% |
| Memory | ||
| Memory Type | DDR4 | DDR5 |
| Memory Slots | 4 | 4 |
| Max Memory | 128 GB | 256 GB |
| Max Memory Speed | 4,666 MHz | 7,200 MHz+54% |
| Expansion | ||
| M.2 Slots | 3+50% | 2 |
| SATA Ports | 6+50% | 4 |
| PCIe x16 Slots | 2+100% | 1 |
| PCIe x1 Slots | 2+100% | 1 |
| Connectivity | ||
| USB Type-C | 1 | 1 |
| USB Type-A | 6 | 6 |
| Wi-Fi | N/A | Wi-Fi 7 |
| LAN | 2.5 GbE | 2.5 GbE |
| Audio | Realtek ALC1200 | Realtek ALC897 |
| Design | ||
| VRM Phases | 12+2+27% | 8+2+1 |
| Price | ||
| MSRP | $130−13% | $150 |
| Release Date | Jun 2020 | Jan 2025 |
