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Corsair RM1000x Shift — 1000 W · 80+ Gold · ATX 3.1
Corsair

Corsair RM1000x Shift

1000 W · 80+ Gold · ATX 3.1

92
/ 100
From $229
VS
Seasonic Vertex PX-1200 wins by 1
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
Specdex verdict

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

In our weighted Specdex score, Corsair RM1000x Shift lands at 92 and Seasonic Vertex PX-1200 at 93. That puts Seasonic Vertex PX-1200 ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Corsair RM1000x Shift if…

  • ✓ATX 3.1 + 12V-2x6
  • ✓Side-mounted cables
  • ✓Quiet zero-RPM

Pick Seasonic Vertex PX-1200 if…

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

Corsair RM1000x Shift

Compared on the noise sub-score

Corsair RM1000x Shift leads on noise (94 vs 92).

Cables

Corsair RM1000x Shift

Compared on the cables sub-score

Corsair RM1000x Shift leads on cables (96 vs 90).

Value for money

Corsair RM1000x Shift

Specdex score per dollar at MSRP

Corsair RM1000x Shift more score per dollar ($229 vs $289).

Corsair RM1000x Shift 92
vs
93 Seasonic Vertex PX-1200

Score breakdown

Corsair RM1000x Shift
92
efficiency 90
noise 94
cables 96
value 88
Seasonic Vertex PX-1200
93
efficiency 96
noise 92
cables 90
value 86

Specs side-by-side

Corsair RM1000x Shift versus Seasonic Vertex PX-1200 — full spec comparison
Spec Corsair RM1000x Shift Seasonic Vertex PX-1200
Wattage
1000 W
1200 W
Efficiency
80+ Gold
80+ Platinum
Standard
ATX 3.1
ATX 3.0
Connectors
1× 12V-2x6 (600W)
1× 16-pin 12VHPWR (600W)
Fan
135 mm FDB
—

Corsair RM1000x Shift

Pros
  • +ATX 3.1 + 12V-2x6
  • +Side-mounted cables
  • +Quiet zero-RPM
Cons
  • −Bulky side depth
  • −Price creep
  • −Gold not Platinum

Seasonic Vertex PX-1200

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

FAQ: Corsair RM1000x Shift vs Seasonic Vertex PX-1200

Which is better, Corsair RM1000x Shift or Seasonic Vertex PX-1200? +

Seasonic Vertex PX-1200 scores 93 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.

Is Corsair RM1000x Shift worth the price? +

At $229, Corsair RM1000x Shift delivers a Specdex score of 92 — strongest in cables.

Is Seasonic Vertex PX-1200 worth the price? +

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

Does Corsair RM1000x Shift 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, Corsair RM1000x Shift 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, Corsair RM1000x Shift or Seasonic Vertex PX-1200? +

Corsair RM1000x Shift — leads on noise (94 vs 92). Compared on the noise sub-score.