Corsair RM850e
850W · 80+ Gold · 12VHPWR
Corsair RM1000x Shift
1000 W · 80+ Gold · ATX 3.1
Corsair RM1000x Shift takes it — here’s why.
In our weighted Specdex score, Corsair RM850e lands at 89 and Corsair RM1000x Shift at 92. That puts Corsair RM1000x Shift ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Corsair RM850e if…
- ✓Sub-$150 12VHPWR-ready PSU
- ✓80+ Gold + Cybenetics Gold
- ✓7-year warranty
Pick Corsair RM1000x Shift if…
- ✓ATX 3.1 + 12V-2x6
- ✓Side-mounted cables
- ✓Quiet zero-RPM
Winner by scenario
Derived from the sub-score breakdown · not a separate testEfficiency
Corsair RM850eCompared on the efficiency sub-score
Corsair RM850e leads on efficiency (92 vs 90).
Value for money
Corsair RM850eSpecdex score per dollar at MSRP
Corsair RM850e more score per dollar ($139 vs $229).
Score breakdown
Specs side-by-side
| Spec | Corsair RM850e | Corsair RM1000x Shift |
|---|---|---|
| Wattage | 850W | 1000 W |
| Efficiency | 80+ Gold | 80+ Gold |
| Cooling | 120 mm rifle-bearing fan | — |
| Modular | Fully modular | — |
| 12VHPWR | 1× 600W native | — |
| Warranty | 7 years | — |
| Standard | — | ATX 3.1 |
| Connectors | — | 1× 12V-2x6 (600W) |
| Fan | — | 135 mm FDB |
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
Corsair RM1000x Shift
- +ATX 3.1 + 12V-2x6
- +Side-mounted cables
- +Quiet zero-RPM
- −Bulky side depth
- −Price creep
- −Gold not Platinum
FAQ: Corsair RM850e vs Corsair RM1000x Shift
Which is better, Corsair RM850e or Corsair RM1000x Shift? +
Corsair RM1000x Shift scores 92 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.
Is Corsair RM850e worth the price? +
At $139, Corsair RM850e delivers a Specdex score of 89 — strongest in value.
Is Corsair RM1000x Shift worth the price? +
At $229, Corsair RM1000x Shift delivers a Specdex score of 92 — strongest in cables.
Does Corsair RM850e or Corsair RM1000x Shift 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 better for efficiency, Corsair RM850e or Corsair RM1000x Shift? +
Corsair RM850e — leads on efficiency (92 vs 90). Compared on the efficiency sub-score.
Which is the better value, Corsair RM850e or Corsair RM1000x Shift? +
Corsair RM850e — more score per dollar ($139 vs $229). Specdex score per dollar at MSRP.