Between the HX1500i (2023) and RM850e (2023), the HX1500i (2023) comes out ahead in wattage / warranty, while the RM850e (2023) wins on several specs. Overall, the HX1500i (2023) scores 90.7 and the RM850e (2023) scores 61.1 on our Mars Score.
Which should you buy?
The HX1500i (2023) is the clear pick on raw spec strength, leading by 29.6 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 / warranty. The biggest gaps in its favor are wattage, warranty, efficiency.
The RM850e (2023) similarly does not 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, so those specs do not 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 — 76.47% more. 1500 W vs 850 W.
- ▲Warranty — 3.00 yrs more. 10 vs 7.
- ▲Efficiency: 80+ Platinum (vs 80+ Gold).
Why Corsair - RM850e (2023) wins
- No decisive advantages.
Spec comparison
Spec
| Spec | Corsair - HX1500i (2023) | Corsair - RM850e (2023) |
|---|---|---|
| Wattage | 1500 Wlead | 850 W |
| Efficiency | 80+ Platinumlead | 80+ Gold |
| Form factor | ATX | ATX |
Features
| Spec | Corsair - HX1500i (2023) | Corsair - RM850e (2023) |
|---|---|---|
| Modular | full | full |
| ATX 3.0 / 12VHPWR | true | true |
| Warranty | 10 yrslead | 7 yrs |
Spec-level deep dives
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