Corsair
Corsair RM1000x Shift
1000 W · 80+ Gold · ATX 3.1
92
/ 100
From $229
VS
Seasonic Vertex PX-1200 wins by 1
Seasonic
Seasonic Vertex PX-1200
1200 W · 80+ Platinum · ATX 3.0
93
/ 100
From $289
Verdex verdict
Seasonic Vertex PX-1200 takes it — here’s why.
In our weighted Verdex 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
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
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 Verdex score of 92 — strongest in cables.
Is Seasonic Vertex PX-1200 worth the price? +
At $289, Seasonic Vertex PX-1200 delivers a Verdex 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.