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Corsair RM850x Shift — 850 W · Gold
Corsair

Corsair RM850x Shift

850 W · Gold

90
/ 100
From $179
VS
Seasonic Vertex GX-1000 — 1000 W · Gold
Seasonic

Seasonic Vertex GX-1000

1000 W · Gold

90
/ 100
From $199
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Corsair RM850x Shift lands at 90 and Seasonic Vertex GX-1000 at 90. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Corsair RM850x Shift if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many

Pick Seasonic Vertex GX-1000 if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many
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Winner by scenario

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

Efficiency

Tie

Compared on the efficiency sub-score

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

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 $199).

Corsair RM850x Shift 90
vs
90 Seasonic Vertex GX-1000

Score breakdown

Corsair RM850x Shift
90
efficiency 90
noise 86
cables 86
value 84
Seasonic Vertex GX-1000
90
efficiency 90
noise 86
cables 86
value 84

Specs side-by-side

Corsair RM850x Shift versus Seasonic Vertex GX-1000 — full spec comparison
Spec Corsair RM850x Shift Seasonic Vertex GX-1000
Wattage
850 W
1000 W
Efficiency
Gold
Gold

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

Seasonic Vertex GX-1000

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 RM850x Shift vs Seasonic Vertex GX-1000

Which is better, Corsair RM850x Shift or Seasonic Vertex GX-1000? +

Both score 90 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is Corsair RM850x Shift worth the price? +

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

Is Seasonic Vertex GX-1000 worth the price? +

At $199, Seasonic Vertex GX-1000 delivers a Specdex score of 90 — strongest in efficiency.

Does Corsair RM850x Shift or Seasonic Vertex GX-1000 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 RM850x Shift or Seasonic Vertex GX-1000? +

Corsair RM850x Shift — more score per dollar ($179 vs $199). Specdex score per dollar at MSRP.