Corsair
Corsair SF1000L
1000 W · Gold
91
/ 100
From $299
VS
Corsair SF1000L wins by 1
Corsair
Corsair RM850x Shift
850 W · Gold
90
/ 100
From $179
Specdex verdict
Corsair SF1000L takes it — here’s why.
In our weighted Specdex score, Corsair SF1000L lands at 91 and Corsair RM850x Shift at 90. That puts Corsair SF1000L ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Corsair SF1000L if…
- ✓Modular cabling on most
- ✓ATX 3.1 / 12V-2x6 support
- ✓10-year warranty on many
Pick Corsair RM850x Shift if…
- ✓Modular cabling on most
- ✓ATX 3.1 / 12V-2x6 support
- ✓10-year warranty on many
Corsair SF1000L 91
vs 90 Corsair RM850x Shift
Score breakdown
Corsair SF1000L
91 efficiency 91
noise 86
cables 86
value 84
Corsair RM850x Shift
90 efficiency 90
noise 86
cables 86
value 84
Specs side-by-side
| Spec | Corsair SF1000L | Corsair RM850x Shift |
|---|---|---|
| Wattage | 1000 W | 850 W |
| Efficiency | Gold | Gold |
Corsair SF1000L
Pros
- +Modular cabling on most
- +ATX 3.1 / 12V-2x6 support
- +10-year warranty on many
Cons
- −Bulky on higher wattages
- −Fan noise varies by load
- −Cable length may not fit some cases
Corsair RM850x Shift
Pros
- +Modular cabling on most
- +ATX 3.1 / 12V-2x6 support
- +10-year warranty on many
Cons
- −Bulky on higher wattages
- −Fan noise varies by load
- −Cable length may not fit some cases
FAQ: Corsair SF1000L vs Corsair RM850x Shift
Which is better, Corsair SF1000L or Corsair RM850x Shift? +
Corsair SF1000L scores 91 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.
Is Corsair SF1000L worth the price? +
At $299, Corsair SF1000L delivers a Specdex score of 91 — strongest in efficiency.
Is Corsair RM850x Shift worth the price? +
At $179, Corsair RM850x Shift delivers a Specdex score of 90 — strongest in efficiency.
Does Corsair SF1000L or Corsair RM850x 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.