Seasonic
Seasonic Focus GX-850
850 W · Gold
88
/ 100
From $149
VS
Seasonic Vertex PX-1200 wins by 5
Seasonic
Seasonic Vertex PX-1200
1200 W · 80+ Platinum · ATX 3.0
93
/ 100
From $289
Specdex verdict
Seasonic Vertex PX-1200 takes it — here’s why.
In our weighted Specdex score, Seasonic Focus GX-850 lands at 88 and Seasonic Vertex PX-1200 at 93. That puts Seasonic Vertex PX-1200 ahead by 5 points — a decisive 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 Seasonic Vertex PX-1200 if…
- ✓Rock-solid ripple
- ✓Platinum efficiency
- ✓Long 12-year warranty
Seasonic Focus GX-850 88
vs 93 Seasonic Vertex PX-1200
Score breakdown
Seasonic Focus GX-850
88 efficiency 88
noise 86
cables 86
value 84
Seasonic Vertex PX-1200
93 efficiency 96
noise 92
cables 90
value 86
Specs side-by-side
| Spec | Seasonic Focus GX-850 | Seasonic Vertex PX-1200 |
|---|---|---|
| Wattage | 850 W | 1200 W |
| Efficiency | Gold | 80+ Platinum |
| Standard | — | ATX 3.0 |
| Connectors | — | 1× 16-pin 12VHPWR (600W) |
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
Seasonic Vertex PX-1200
Pros
- +Rock-solid ripple
- +Platinum efficiency
- +Long 12-year warranty
Cons
- −Heavy at 2.6 kg
- −Expensive
- −Cables stiff
FAQ: Seasonic Focus GX-850 vs Seasonic Vertex PX-1200
Which is better, Seasonic Focus GX-850 or Seasonic Vertex PX-1200? +
Seasonic Vertex PX-1200 scores 93 on our weighted rubric — ahead by 5. 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 Seasonic Vertex PX-1200 worth the price? +
At $289, Seasonic Vertex PX-1200 delivers a Specdex score of 93 — strongest in efficiency.
Does Seasonic Focus GX-850 or Seasonic Vertex PX-1200 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.