be quiet! Straight Power 12 850W vs Corsair RM750x (2024)
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | be quiet! Straight Power 12 850W | Corsair RM750x (2024) |
|---|---|---|
| Wattage | 850W | 750W |
| Efficiency Tier | platinum | gold |
| ATX Version | ATX 3.1 | ATX 3.1 |
| 12V-2x6 (RTX 5090 safe) | ✓ Yes | ✓ Yes |
| Modular | full | full |
| Cybenetics Rating | ETA-A+ | ETA-A |
| MSRP | $189 | $109 |
| Est. Annual Electricity Cost | $246/yr | $252/yr |
| 5-Year Total Cost (TCO) | $1419 | $1369 |
5-Year Total Cost of Ownership
Assuming 500W average draw, 8 hours/day gaming, and $0.15/kWh electricity:
Corsair RM750x (2024) costs ~$1369 over 5 years (purchase + electricity), saving approximately $50 compared to be quiet! Straight Power 12 850W.
Note: be quiet! Straight Power 12 850W has higher efficiency but higher upfront cost. The TCO crossover depends on your electricity rate and usage.
Frequently Asked Questions
Which is more efficient — be quiet! Straight Power 12 850W or Corsair RM750x (2024)?
be quiet! Straight Power 12 850W is rated 80+ Platinum (~89% efficient), making it more efficient than Corsair RM750x (2024) (80+ Gold (~87% efficient)). Higher efficiency means less electricity waste as heat, lower operating costs, and better thermal performance.
Can be quiet! Straight Power 12 850W run an RTX 5090?
be quiet! Straight Power 12 850W includes a native 12V-2x6 cable and supports ATX 3.1 — it is compatible with the RTX 5090, provided the wattage (850W) is sufficient for your full build.
Which has lower long-term cost?
At $0.15/kWh and 8 hours/day, Corsair RM750x (2024) costs ~$1369 total over 5 years (purchase + electricity) vs ~$1419 for be quiet! Straight Power 12 850W — a difference of ~$50.