Seasonic FOCUS GX-650 vs be quiet! Straight Power 12 750W
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | Seasonic FOCUS GX-650 | be quiet! Straight Power 12 750W |
|---|---|---|
| Wattage | 650W | 750W |
| Efficiency Tier | gold | platinum |
| ATX Version | ATX 3.0 | ATX 3.1 |
| 12V-2x6 (RTX 5090 safe) | ✗ No | ✓ Yes |
| Modular | full | full |
| Cybenetics Rating | ETA-A | ETA-A |
| MSRP | $99 | $159 |
| Est. Annual Electricity Cost | $252/yr | $246/yr |
| 5-Year Total Cost (TCO) | $1359 | $1389 |
5-Year Total Cost of Ownership
Assuming 500W average draw, 8 hours/day gaming, and $0.15/kWh electricity:
Seasonic FOCUS GX-650 costs ~$1359 over 5 years (purchase + electricity), saving approximately $30 compared to be quiet! Straight Power 12 750W.
Note: be quiet! Straight Power 12 750W has higher efficiency but higher upfront cost. The TCO crossover depends on your electricity rate and usage.
Frequently Asked Questions
Which is more efficient — Seasonic FOCUS GX-650 or be quiet! Straight Power 12 750W?
be quiet! Straight Power 12 750W is rated 80+ Platinum (~89% efficient), making it more efficient than Seasonic FOCUS GX-650 (80+ Gold (~87% efficient)). Higher efficiency means less electricity waste as heat, lower operating costs, and better thermal performance.
Can Seasonic FOCUS GX-650 run an RTX 5090?
Seasonic FOCUS GX-650 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, Seasonic FOCUS GX-650 costs ~$1359 total over 5 years (purchase + electricity) vs ~$1389 for be quiet! Straight Power 12 750W — a difference of ~$30.