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Seasonic Vertex PX-1200 — 1200 W · 80+ Platinum · ATX 3.0
Seasonic

Seasonic Vertex PX-1200

1200 W · 80+ Platinum · ATX 3.0

93
/ 100
From $289
VS
Seasonic Vertex PX-1200 wins by 3
be quiet! Straight Power 12 850W — 850 W · Platinum
be quiet!

be quiet! Straight Power 12 850W

850 W · Platinum

90
/ 100
From $199
Specdex verdict

Seasonic Vertex PX-1200 takes it — here’s why.

In our weighted Specdex score, Seasonic Vertex PX-1200 lands at 93 and be quiet! Straight Power 12 850W at 90. That puts Seasonic Vertex PX-1200 ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Seasonic Vertex PX-1200 if…

  • ✓Rock-solid ripple
  • ✓Platinum efficiency
  • ✓Long 12-year warranty

Pick be quiet! Straight Power 12 850W if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Efficiency

Seasonic Vertex PX-1200

Compared on the efficiency sub-score

Seasonic Vertex PX-1200 leads on efficiency (96 vs 90).

Noise

Seasonic Vertex PX-1200

Compared on the noise sub-score

Seasonic Vertex PX-1200 leads on noise (92 vs 86).

Cables

Seasonic Vertex PX-1200

Compared on the cables sub-score

Seasonic Vertex PX-1200 leads on cables (90 vs 86).

Value for money

be quiet! Straight Power 12 850W

Specdex score per dollar at MSRP

be quiet! Straight Power 12 850W more score per dollar ($199 vs $289).

Seasonic Vertex PX-1200 93
vs
90 be quiet! Straight Power 12 850W

Score breakdown

Seasonic Vertex PX-1200
93
efficiency 96
noise 92
cables 90
value 86
be quiet! Straight Power 12 850W
90
efficiency 90
noise 86
cables 86
value 84

Specs side-by-side

Seasonic Vertex PX-1200 versus be quiet! Straight Power 12 850W — full spec comparison
Spec Seasonic Vertex PX-1200 be quiet! Straight Power 12 850W
Wattage
1200 W
850 W
Efficiency
80+ Platinum
Platinum
Standard
ATX 3.0
—
Connectors
1× 16-pin 12VHPWR (600W)
—

Seasonic Vertex PX-1200

Pros
  • +Rock-solid ripple
  • +Platinum efficiency
  • +Long 12-year warranty
Cons
  • −Heavy at 2.6 kg
  • −Expensive
  • −Cables stiff

be quiet! Straight Power 12 850W

Pros
  • +Modular cabling on most
  • +ATX 3.1 / 12V-2x6 support
  • +10-year warranty on many
Cons
  • −Bulky on higher wattages
  • −Fan noise varies by load
  • −Cable length may not fit some cases

FAQ: Seasonic Vertex PX-1200 vs be quiet! Straight Power 12 850W

Which is better, Seasonic Vertex PX-1200 or be quiet! Straight Power 12 850W? +

Seasonic Vertex PX-1200 scores 93 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.

Is Seasonic Vertex PX-1200 worth the price? +

At $289, Seasonic Vertex PX-1200 delivers a Specdex score of 93 — strongest in efficiency.

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.

Does Seasonic Vertex PX-1200 or be quiet! Straight Power 12 850W 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, Seasonic Vertex PX-1200 or be quiet! Straight Power 12 850W? +

Seasonic Vertex PX-1200 — leads on efficiency (96 vs 90). Compared on the efficiency sub-score.

Which is better for noise, Seasonic Vertex PX-1200 or be quiet! Straight Power 12 850W? +

Seasonic Vertex PX-1200 — leads on noise (92 vs 86). Compared on the noise sub-score.