Seasonic
Seasonic Focus GX-850
850 W · Gold
88
/ 100
From $149
VS
Corsair RM1000x Shift wins by 4
Corsair
Corsair RM1000x Shift
1000 W · 80+ Gold · ATX 3.1
92
/ 100
From $229
Specdex verdict
Corsair RM1000x Shift takes it — here’s why.
In our weighted Specdex score, Seasonic Focus GX-850 lands at 88 and Corsair RM1000x Shift at 92. That puts Corsair RM1000x Shift ahead by 4 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Seasonic Focus GX-850 if…
- ✓Modular cabling on most
- ✓ATX 3.1 / 12V-2x6 support
- ✓10-year warranty on many
Pick Corsair RM1000x Shift if…
- ✓ATX 3.1 + 12V-2x6
- ✓Side-mounted cables
- ✓Quiet zero-RPM
Seasonic Focus GX-850 88
vs 92 Corsair RM1000x Shift
Score breakdown
Seasonic Focus GX-850
88 efficiency 88
noise 86
cables 86
value 84
Corsair RM1000x Shift
92 efficiency 90
noise 94
cables 96
value 88
Specs side-by-side
| Spec | Seasonic Focus GX-850 | Corsair RM1000x Shift |
|---|---|---|
| Wattage | 850 W | 1000 W |
| Efficiency | Gold | 80+ Gold |
| Standard | — | ATX 3.1 |
| Connectors | — | 1× 12V-2x6 (600W) |
| Fan | — | 135 mm FDB |
Seasonic Focus GX-850
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 RM1000x Shift
Pros
- +ATX 3.1 + 12V-2x6
- +Side-mounted cables
- +Quiet zero-RPM
Cons
- −Bulky side depth
- −Price creep
- −Gold not Platinum
FAQ: Seasonic Focus GX-850 vs Corsair RM1000x Shift
Which is better, Seasonic Focus GX-850 or Corsair RM1000x Shift? +
Corsair RM1000x Shift scores 92 on our weighted rubric — ahead by 4. Your best pick depends on the sub-scores above.
Is Seasonic Focus GX-850 worth the price? +
At $149, Seasonic Focus GX-850 delivers a Specdex score of 88 — strongest in efficiency.
Is Corsair RM1000x Shift worth the price? +
At $229, Corsair RM1000x Shift delivers a Specdex score of 92 — strongest in cables.
Does Seasonic Focus GX-850 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.