be quiet! Straight Power 12 850W
850 W · Platinum
Seasonic Vertex PX-1200
1200 W · 80+ Platinum · ATX 3.0
Seasonic Vertex PX-1200 takes it — here’s why.
In our weighted Specdex score, be quiet! Straight Power 12 850W lands at 90 and Seasonic Vertex PX-1200 at 93. That puts Seasonic Vertex PX-1200 ahead by 3 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 Seasonic Vertex PX-1200 if…
- ✓Rock-solid ripple
- ✓Platinum efficiency
- ✓Long 12-year warranty
Winner by scenario
Derived from the sub-score breakdown · not a separate testEfficiency
Seasonic Vertex PX-1200Compared on the efficiency sub-score
Seasonic Vertex PX-1200 leads on efficiency (96 vs 90).
Noise
Seasonic Vertex PX-1200Compared on the noise sub-score
Seasonic Vertex PX-1200 leads on noise (92 vs 86).
Cables
Seasonic Vertex PX-1200Compared on the cables sub-score
Seasonic Vertex PX-1200 leads on cables (90 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 $289).
Score breakdown
Specs side-by-side
| Spec | be quiet! Straight Power 12 850W | Seasonic Vertex PX-1200 |
|---|---|---|
| Wattage | 850 W | 1200 W |
| Efficiency | Platinum | 80+ Platinum |
| Standard | — | ATX 3.0 |
| Connectors | — | 1× 16-pin 12VHPWR (600W) |
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
Seasonic Vertex PX-1200
- +Rock-solid ripple
- +Platinum efficiency
- +Long 12-year warranty
- −Heavy at 2.6 kg
- −Expensive
- −Cables stiff
FAQ: be quiet! Straight Power 12 850W vs Seasonic Vertex PX-1200
Which is better, be quiet! Straight Power 12 850W or Seasonic Vertex PX-1200? +
Seasonic Vertex PX-1200 scores 93 on our weighted rubric — ahead by 3. 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 Seasonic Vertex PX-1200 worth the price? +
At $289, Seasonic Vertex PX-1200 delivers a Specdex score of 93 — strongest in efficiency.
Does be quiet! Straight Power 12 850W or Seasonic Vertex PX-1200 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 efficiency, be quiet! Straight Power 12 850W or Seasonic Vertex PX-1200? +
Seasonic Vertex PX-1200 — leads on efficiency (96 vs 90). Compared on the efficiency sub-score.
Which is better for noise, be quiet! Straight Power 12 850W or Seasonic Vertex PX-1200? +
Seasonic Vertex PX-1200 — leads on noise (92 vs 86). Compared on the noise sub-score.