be quiet! Straight Power 12 850W
850 W · Platinum
Corsair RM1000x Shift
1000 W · 80+ Gold · ATX 3.1
Corsair RM1000x Shift takes it — here’s why.
In our weighted Specdex score, be quiet! Straight Power 12 850W lands at 90 and Corsair RM1000x Shift at 92. That puts Corsair RM1000x Shift ahead by 2 points — a narrow margin driven mostly by its strengths in the categories below.
Pick be quiet! Straight Power 12 850W if…
- ✓Modular cabling on most
- ✓ATX 3.1 / 12V-2x6 support
- ✓10-year warranty on many
Pick Corsair RM1000x Shift if…
- ✓ATX 3.1 + 12V-2x6
- ✓Side-mounted cables
- ✓Quiet zero-RPM
Winner by scenario
Derived from the sub-score breakdown · not a separate testCables
Corsair RM1000x ShiftCompared on the cables sub-score
Corsair RM1000x Shift leads on cables (96 vs 86).
Efficiency
TieCompared on the efficiency sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Noise
Corsair RM1000x ShiftCompared on the noise sub-score
Corsair RM1000x Shift leads on noise (94 vs 86).
Value for money
be quiet! Straight Power 12 850WSpecdex score per dollar at MSRP
be quiet! Straight Power 12 850W more score per dollar ($199 vs $229).
Score breakdown
Specs side-by-side
| Spec | be quiet! Straight Power 12 850W | Corsair RM1000x Shift |
|---|---|---|
| Wattage | 850 W | 1000 W |
| Efficiency | Platinum | 80+ Gold |
| Standard | — | ATX 3.1 |
| Connectors | — | 1× 12V-2x6 (600W) |
| Fan | — | 135 mm FDB |
be quiet! Straight Power 12 850W
- +Modular cabling on most
- +ATX 3.1 / 12V-2x6 support
- +10-year warranty on many
- −Bulky on higher wattages
- −Fan noise varies by load
- −Cable length may not fit some cases
Corsair RM1000x Shift
- +ATX 3.1 + 12V-2x6
- +Side-mounted cables
- +Quiet zero-RPM
- −Bulky side depth
- −Price creep
- −Gold not Platinum
FAQ: be quiet! Straight Power 12 850W vs Corsair RM1000x Shift
Which is better, be quiet! Straight Power 12 850W or Corsair RM1000x Shift? +
Corsair RM1000x Shift scores 92 on our weighted rubric — ahead by 2. Your best pick depends on the sub-scores above.
Is be quiet! Straight Power 12 850W worth the price? +
At $199, be quiet! Straight Power 12 850W delivers a Specdex score of 90 — strongest in efficiency.
Is Corsair RM1000x Shift worth the price? +
At $229, Corsair RM1000x Shift delivers a Specdex score of 92 — strongest in cables.
Does be quiet! Straight Power 12 850W or Corsair RM1000x Shift last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.
Which is better for cables, be quiet! Straight Power 12 850W or Corsair RM1000x Shift? +
Corsair RM1000x Shift — leads on cables (96 vs 86). Compared on the cables sub-score.
Which is better for noise, be quiet! Straight Power 12 850W or Corsair RM1000x Shift? +
Corsair RM1000x Shift — leads on noise (94 vs 86). Compared on the noise sub-score.