Between the RM1200x SHIFT and FOCUS GX-850, the RM1200x SHIFT comes out ahead in wattage, while the FOCUS GX-850 wins on several specs. Overall, the RM1200x SHIFT scores 77.5 and the FOCUS GX-850 scores 61.1 on our Mars Score.
Which should you buy?
The RM1200x SHIFT is the clear pick on raw spec strength, leading by 16.4 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the RM1200x SHIFT if you care most about wattage. The biggest gaps in its favor are wattage.
The FOCUS GX-850 similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable efficiency, modular, atx 3.0 / 12vhpwr, so those specs don't separate the two — focus on the differences below.
Bottom line: the RM1200x SHIFT is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Corsair - RM1200x SHIFT wins
- ▲Wattage — 41.18% more. 1200 W vs 850 W.
Why Seasonic - FOCUS GX-850 wins
- No decisive advantages.
Spec comparison
Spec
| Spec | Corsair - RM1200x SHIFT | Seasonic - FOCUS GX-850 |
|---|---|---|
| Wattage | 1200 Wlead | 850 W |
| Efficiency | 80+ Gold | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - RM1200x SHIFT | Seasonic - FOCUS GX-850 |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 10 yrs | 10 yrs |
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.