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; the decision sits on which individual spec advantages weigh more for your use.
The RM1200x SHIFT does not 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 do not 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 says 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 |
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.