Between the RM1200x SHIFT and C1500 Platinum, the RM1200x SHIFT comes out ahead in several specs, while the C1500 Platinum wins on wattage and efficiency. Overall, the RM1200x SHIFT scores 77.5 and the C1500 Platinum scores 90.7 on our Mars Score.
Which should you buy?
The C1500 Platinum is the clear pick on raw spec strength, leading by 13.2 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.
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 C1500 Platinum if you care most about wattage and efficiency. Its strongest claims are wattage, efficiency.
Both ship with comparable modular, atx 3.0 / 12vhpwr, warranty, so those specs don't separate the two — focus on the differences below.
Bottom line: the C1500 Platinum 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
- No decisive advantages.
Why NZXT - C1500 Platinum wins
- ▲Wattage — 25.00% more. 1500 W vs 1200 W.
- ▲Efficiency: 80+ Platinum (vs 80+ Gold).
Spec comparison
Spec
| Spec | Corsair - RM1200x SHIFT | NZXT - C1500 Platinum |
|---|---|---|
| Wattage | 1200 W | 1500 Wlead |
| Efficiency | 80+ Gold | 80+ Platinumlead |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - RM1200x SHIFT | NZXT - C1500 Platinum |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 10 yrs | 10 yrs |
Frequently asked
Spec-level deep dives
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