Between the RM1200x SHIFT and VERTEX GX-1200, the RM1200x SHIFT comes out ahead in several specs, while the VERTEX GX-1200 wins on warranty. Overall, the RM1200x SHIFT scores 77.5 and the VERTEX GX-1200 scores 77.5 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes, with the decision sitting on which individual spec advantages weigh more for your use.
The RM1200x SHIFT doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the VERTEX GX-1200 if you care most about warranty. Its strongest claims are warranty.
Both ship with comparable wattage, efficiency, modular, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Corsair - RM1200x SHIFT wins
- No decisive advantages.
Why Seasonic - VERTEX GX-1200 wins
- ▲Warranty — 2.00 yrs more. 12 vs 10.
Spec comparison
Spec
| Spec | Corsair - RM1200x SHIFT | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Wattage | 1200 W | 1200 W |
| Efficiency | 80+ Gold | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - RM1200x SHIFT | Seasonic - VERTEX GX-1200 |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 10 yrs | 12 yrslead |
Frequently asked
Spec-level deep dives
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