Corsair SF750 Platinum vs Seasonic FOCUS GX-650
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | Corsair SF750 Platinum | Seasonic FOCUS GX-650 |
|---|---|---|
| Wattage | 750W | 650W |
| Efficiency Tier | platinum | gold |
| ATX Version | ATX 2.x | ATX 3.0 |
| 12V-2x6 (RTX 5090 safe) | ✗ No | ✗ No |
| Modular | full | full |
| Cybenetics Rating | — | ETA-A |
| MSRP | $179 | $99 |
| Est. Annual Electricity Cost | $246/yr | $252/yr |
| 5-Year Total Cost (TCO) | $1409 | $1359 |
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 $50 compared to Corsair SF750 Platinum.
Note: Corsair SF750 Platinum has higher efficiency but higher upfront cost. The TCO crossover depends on your electricity rate and usage.
Frequently Asked Questions
Which is more efficient — Corsair SF750 Platinum or Seasonic FOCUS GX-650?
Corsair SF750 Platinum 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 Corsair SF750 Platinum run an RTX 5090?
Corsair SF750 Platinum 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 ~$1409 for Corsair SF750 Platinum — a difference of ~$50.