Seasonic
Seasonic Vertex GX-1000
1000 W · Gold
90
/ 100
From $199
VS
Corsair
Corsair RM850x Shift
850 W · Gold
90
/ 100
From $179
Specdex verdict
Dead heat — it comes down to priorities.
In our weighted Specdex score, Seasonic Vertex GX-1000 lands at 90 and Corsair RM850x Shift at 90. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick Seasonic Vertex GX-1000 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
Seasonic Vertex GX-1000 90
vs 90 Corsair RM850x Shift
Score breakdown
Seasonic Vertex GX-1000
90 efficiency 90
noise 86
cables 86
value 84
Corsair RM850x Shift
90 efficiency 90
noise 86
cables 86
value 84
Specs side-by-side
| Spec | Seasonic Vertex GX-1000 | Corsair RM850x Shift |
|---|---|---|
| Wattage | 1000 W | 850 W |
| Efficiency | Gold | Gold |
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
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: Seasonic Vertex GX-1000 vs Corsair RM850x Shift
Which is better, Seasonic Vertex GX-1000 or Corsair RM850x Shift? +
Both score 90 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
Is Seasonic Vertex GX-1000 worth the price? +
At $199, Seasonic Vertex GX-1000 delivers a Specdex score of 90 — 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 Seasonic Vertex GX-1000 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.