be quiet! Straight Power 12 750W vs Corsair RM850x (2024)
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | be quiet! Straight Power 12 750W | Corsair RM850x (2024) |
|---|---|---|
| Wattage | 750W | 850W |
| 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 | $159 | $139 |
| Est. Annual Electricity Cost | $246/yr | $252/yr |
| 5-Year Total Cost (TCO) | $1389 | $1399 |
5-Year Total Cost of Ownership
Assuming 500W average draw, 8 hours/day gaming, and $0.15/kWh electricity:
be quiet! Straight Power 12 750W costs ~$1389 over 5 years (purchase + electricity), saving approximately $10 compared to Corsair RM850x (2024).
Frequently Asked Questions
Which is more efficient — be quiet! Straight Power 12 750W or Corsair RM850x (2024)?
be quiet! Straight Power 12 750W is rated 80+ Platinum (~89% efficient), making it more efficient than Corsair RM850x (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 750W run an RTX 5090?
be quiet! Straight Power 12 750W includes a native 12V-2x6 cable and supports ATX 3.1 — it is compatible with the RTX 5090, provided the wattage (750W) is sufficient for your full build.
Which has lower long-term cost?
At $0.15/kWh and 8 hours/day, be quiet! Straight Power 12 750W costs ~$1389 total over 5 years (purchase + electricity) vs ~$1399 for Corsair RM850x (2024) — a difference of ~$10.