Corsair RM850x (2024) vs Seasonic PRIME TX-1000
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | Corsair RM850x (2024) | Seasonic PRIME TX-1000 |
|---|---|---|
| Wattage | 850W | 1000W |
| Efficiency Tier | gold | titanium |
| 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 | $329 |
| Est. Annual Electricity Cost | $252/yr | $238/yr |
| 5-Year Total Cost (TCO) | $1399 | $1519 |
5-Year Total Cost of Ownership
Assuming 500W average draw, 8 hours/day gaming, and $0.15/kWh electricity:
Corsair RM850x (2024) costs ~$1399 over 5 years (purchase + electricity), saving approximately $120 compared to Seasonic PRIME TX-1000.
Note: Seasonic PRIME TX-1000 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 PRIME TX-1000?
Seasonic PRIME TX-1000 is rated 80+ Titanium (~92% 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 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, Corsair RM850x (2024) costs ~$1399 total over 5 years (purchase + electricity) vs ~$1519 for Seasonic PRIME TX-1000 — a difference of ~$120.