Between the HX1500i (2023) and RM1200x SHIFT, the HX1500i (2023) comes out ahead in wattage and efficiency, while the RM1200x SHIFT wins on several specs. Overall, the HX1500i (2023) scores 90.7 and the RM1200x SHIFT scores 77.5 on our Mars Score.
Which should you buy?
The HX1500i (2023) 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.
Pick the HX1500i (2023) if you care most about wattage and efficiency. The biggest gaps in its favor are wattage, efficiency.
The RM1200x SHIFT similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
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 HX1500i (2023) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Corsair - HX1500i (2023) wins
- ▲Wattage — 25.00% more. 1500 W vs 1200 W.
- ▲Efficiency: 80+ Platinum (vs 80+ Gold).
Why Corsair - RM1200x SHIFT wins
- No decisive advantages.
Spec comparison
Spec
| Spec | Corsair - HX1500i (2023) | Corsair - RM1200x SHIFT |
|---|---|---|
| Wattage | 1500 Wlead | 1200 W |
| Efficiency | 80+ Platinumlead | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - HX1500i (2023) | Corsair - RM1200x SHIFT |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 10 yrs | 10 yrs |
Frequently asked
Spec-level deep dives
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