The MSI PRO B860M-A WIFI wins in 7 out of 14 comparable specs. Its biggest advantage is Max Memory (200% better).
PRO B660M-A WIFI DDR4 wins in 2 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose PRO B860M-A WIFI if you want the best overall performance — especially max memory.
Choose PRO B660M-A WIFI DDR4 if pcie x1 slots matters more to you.
| Spec | MSIPRO B660M-A WIFI DDR4 | MSIPRO B860M-A WIFI |
|---|---|---|
| Platform | ||
| Socket | LGA1700 | LGA1851 |
| Chipset | B660 | B860 |
| Form Factor | Micro ATX | Micro ATX |
| PCIe Gen | 4 | 5+25% |
| Memory | ||
| Memory Type | DDR4 | DDR5 |
| Memory Slots | 2 | 4+100% |
| Max Memory | 64 GB | |
| 192 GB+200% |
| Max Memory Speed | 4,800 MHz | 7,200 MHz+50% |
| Expansion | ||
| M.2 Slots | 2 | 2 |
| SATA Ports | 4 | 4 |
| PCIe x16 Slots | 1 | 1 |
| PCIe x1 Slots | 2+100% | 1 |
| Connectivity | ||
| USB Type-C | 1 | 1 |
| USB Type-A | 5 | 6+20% |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 7+17% |
| LAN | 2.5 GbE | 2.5 GbE |
| Audio | Realtek ALC897 | Realtek ALC897 |
| Design | ||
| VRM Phases | 6+2+1 | 8+2+1+22% |
| Price | ||
| MSRP | $120−20% | $150 |
| Release Date | Jan 2022 | Jan 2025 |
