Corsair RM850x (2024) vs Seasonic FOCUS GX-750
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | Corsair RM850x (2024) | Seasonic FOCUS GX-750 |
|---|---|---|
| Wattage | 850W | 750W |
| Efficiency Tier | gold | 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 | $139 | $119 |
| Est. Annual Electricity Cost | $252/yr | $252/yr |
| 5-Year Total Cost (TCO) | $1399 | $1379 |
5-Year Total Cost of Ownership
Assuming 500W average draw, 8 hours/day gaming, and $0.15/kWh electricity:
Seasonic FOCUS GX-750 costs ~$1379 over 5 years (purchase + electricity), saving approximately $20 compared to Corsair RM850x (2024).
Note: Corsair RM850x (2024) 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 RM850x (2024) or Seasonic FOCUS GX-750?
Corsair RM850x (2024) is rated 80+ Gold (~87% efficient), making it more efficient than Seasonic FOCUS GX-750 (80+ Gold (~87% efficient)). Higher efficiency means less electricity waste as heat, lower operating costs, and better thermal performance.
Can Corsair RM850x (2024) run an RTX 5090?
Corsair RM850x (2024) 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, Seasonic FOCUS GX-750 costs ~$1379 total over 5 years (purchase + electricity) vs ~$1399 for Corsair RM850x (2024) — a difference of ~$20.