The be quiet! Pure Power 13 M 850W wins in 3 out of 7 comparable specs. Its biggest advantage is 12VHPWR Connector (100% better).
RM850x wins in 1 spec (Modular: 50% better).
Recommendation
Choose Pure Power 13 M 850W if you want the best overall performance — especially 12vhpwr connector.
Choose RM850x if modular matters more to you.
| Spec | be quiet!Pure Power 13 M 850W | CorsairRM850x |
|---|---|---|
| Power | ||
| Wattage | 850W | 850W |
| Efficiency | 80+ Gold | 80+ Gold |
| ATX Version | ATX 3.1+55% | ATX 2.0 |
| Design | ||
| Modular | Semi | Full+50% |
| Fan Size | 120 mm | 140 mm |
| Depth | 160 mm | 160 mm |
| Features | ||
| 12VHPWR Connector | Yes+100% | No |
| Warranty | 10 | 10 |
| Price | ||
| MSRP | $130−7% | $140 |
| Release Date | Jun 2025 | Sep 2021 |
