Corsair CV650 vs be quiet! Straight Power 12 750W
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | Corsair CV650 | be quiet! Straight Power 12 750W |
|---|---|---|
| Wattage | 650W | 750W |
| Efficiency Tier | bronze | platinum |
| ATX Version | ATX 2.x | ATX 3.1 |
| 12V-2x6 (RTX 5090 safe) | ✗ No | ✓ Yes |
| Modular | none | full |
| Cybenetics Rating | — | ETA-A |
| MSRP | $59 | $159 |
| Est. Annual Electricity Cost | $267/yr | $246/yr |
| 5-Year Total Cost (TCO) | $1394 | $1389 |
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 $5 compared to Corsair CV650.
Frequently Asked Questions
Which is more efficient — Corsair CV650 or be quiet! Straight Power 12 750W?
be quiet! Straight Power 12 750W is rated 80+ Platinum (~89% efficient), making it more efficient than Corsair CV650 (80+ Bronze (~82% efficient)). Higher efficiency means less electricity waste as heat, lower operating costs, and better thermal performance.
Can Corsair CV650 run an RTX 5090?
Corsair CV650 does not include a native 12V-2x6 connector. Running an RTX 5090 would require an adapter cable, which is not recommended at the 5090's 575W TBP. Upgrade to an ATX 3.1 PSU with a native 12V-2x6 port.
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 ~$1394 for Corsair CV650 — a difference of ~$5.