Skip to content
Specdex
Compare now
Corsair HX1000i — 1000 W · Platinum
Corsair

Corsair HX1000i

1000 W · Platinum

92
/ 100
From $279
VS
Corsair HX1000i wins by 2
Corsair RM850x Shift — 850 W · Gold
Corsair

Corsair RM850x Shift

850 W · Gold

90
/ 100
From $179
Specdex verdict

Corsair HX1000i takes it — here’s why.

In our weighted Specdex score, Corsair HX1000i lands at 92 and Corsair RM850x Shift at 90. That puts Corsair HX1000i ahead by 2 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 RM850x Shift if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many
Share this comparison: Share to Reddit X / Twitter

Winner by scenario

Derived from the sub-score breakdown · not a separate test

Efficiency

Corsair HX1000i

Compared on the efficiency sub-score

Corsair HX1000i leads on efficiency (92 vs 90).

Noise

Tie

Compared on the noise sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Cables

Tie

Compared on the cables sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Corsair RM850x Shift

Specdex score per dollar at MSRP

Corsair RM850x Shift more score per dollar ($179 vs $279).

Corsair HX1000i 92
vs
90 Corsair RM850x Shift

Score breakdown

Corsair HX1000i
92
efficiency 92
noise 86
cables 86
value 84
Corsair RM850x Shift
90
efficiency 90
noise 86
cables 86
value 84

Specs side-by-side

Corsair HX1000i versus Corsair RM850x Shift — full spec comparison
Spec Corsair HX1000i Corsair RM850x Shift
Wattage
1000 W
850 W
Efficiency
Platinum
Gold

Corsair HX1000i

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 HX1000i vs Corsair RM850x Shift

Which is better, Corsair HX1000i or Corsair RM850x Shift? +

Corsair HX1000i scores 92 on our weighted rubric — ahead by 2. 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 RM850x Shift worth the price? +

At $179, Corsair RM850x Shift delivers a Specdex score of 90 — strongest in efficiency.

Does Corsair HX1000i 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.

Which is better for efficiency, Corsair HX1000i or Corsair RM850x Shift? +

Corsair HX1000i — leads on efficiency (92 vs 90). Compared on the efficiency sub-score.

Which is the better value, Corsair HX1000i or Corsair RM850x Shift? +

Corsair RM850x Shift — more score per dollar ($179 vs $279). Specdex score per dollar at MSRP.