be quiet! Straight Power 12 850W vs Seasonic PRIME TX-1000
Efficiency, ATX compliance, 12V-2x6 support, Cybenetics rating, and 5-year total cost of ownership.
| Spec | be quiet! Straight Power 12 850W | Seasonic PRIME TX-1000 |
|---|---|---|
| Wattage | 850W | 1000W |
| Efficiency Tier | platinum | 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 | $189 | $329 |
| Est. Annual Electricity Cost | $246/yr | $238/yr |
| 5-Year Total Cost (TCO) | $1419 | $1519 |
5-Year Total Cost of Ownership
Assuming 500W average draw, 8 hours/day gaming, and $0.15/kWh electricity:
be quiet! Straight Power 12 850W costs ~$1419 over 5 years (purchase + electricity), saving approximately $100 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 — be quiet! Straight Power 12 850W or Seasonic PRIME TX-1000?
Seasonic PRIME TX-1000 is rated 80+ Titanium (~92% efficient), making it more efficient than be quiet! Straight Power 12 850W (80+ Platinum (~89% efficient)). Higher efficiency means less electricity waste as heat, lower operating costs, and better thermal performance.
Can be quiet! Straight Power 12 850W run an RTX 5090?
be quiet! Straight Power 12 850W 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, be quiet! Straight Power 12 850W costs ~$1419 total over 5 years (purchase + electricity) vs ~$1519 for Seasonic PRIME TX-1000 — a difference of ~$100.