Corsair HX1000i
1000 W · Platinum
Corsair RM850e
850W · 80+ Gold · 12VHPWR
Corsair HX1000i takes it — here’s why.
In our weighted Specdex score, Corsair HX1000i lands at 92 and Corsair RM850e at 89. That puts Corsair HX1000i ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Corsair HX1000i if…
- ✓Modular cabling on most
- ✓ATX 3.1 / 12V-2x6 support
- ✓10-year warranty on many
Pick Corsair RM850e if…
- ✓Sub-$150 12VHPWR-ready PSU
- ✓80+ Gold + Cybenetics Gold
- ✓7-year warranty
Winner by scenario
Derived from the sub-score breakdown · not a separate testEfficiency
TieCompared on the efficiency sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Value for money
Corsair RM850eSpecdex score per dollar at MSRP
Corsair RM850e more score per dollar ($139 vs $279).
Score breakdown
Specs side-by-side
| Spec | Corsair HX1000i | Corsair RM850e |
|---|---|---|
| Wattage | 1000 W | 850W |
| Efficiency | Platinum | 80+ Gold |
| Cooling | — | 120 mm rifle-bearing fan |
| Modular | — | Fully modular |
| 12VHPWR | — | 1× 600W native |
| Warranty | — | 7 years |
Corsair HX1000i
- +Modular cabling on most
- +ATX 3.1 / 12V-2x6 support
- +10-year warranty on many
- −Bulky on higher wattages
- −Fan noise varies by load
- −Cable length may not fit some cases
Corsair RM850e
- +Sub-$150 12VHPWR-ready PSU
- +80+ Gold + Cybenetics Gold
- +7-year warranty
- −Single-rail design (mostly fine)
- −Cables ribbon-flat (some prefer round)
- −No iCUE Link
FAQ: Corsair HX1000i vs Corsair RM850e
Which is better, Corsair HX1000i or Corsair RM850e? +
Corsair HX1000i scores 92 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.
Is Corsair HX1000i worth the price? +
At $279, Corsair HX1000i delivers a Specdex score of 92 — strongest in efficiency.
Is Corsair RM850e worth the price? +
At $139, Corsair RM850e delivers a Specdex score of 89 — strongest in value.
Does Corsair HX1000i or Corsair RM850e last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.
Which is the better value, Corsair HX1000i or Corsair RM850e? +
Corsair RM850e — more score per dollar ($139 vs $279). Specdex score per dollar at MSRP.