Seasonic Vertex PX-1200 Review
1200 W · 80+ Platinum · ATX 3.0
Specdex verdict The Seasonic Vertex PX-1200 earns Specdex's editor's pick — flagship-tier with no significant weak spots, a clear recommendation in its category.
Seasonic’s Platinum flagship — reference-quality voltage regulation, quiet, and a 12-year warranty.
Specdex doesn't run benchmarks in-house. The verdict is an editorial assessment based on manufacturer specs and public reviewer consensus. See methodology.
Seasonic Vertex PX-1200 versus its closest rivals
- +Rock-solid ripple
- +Platinum efficiency
- +Long 12-year warranty
- −Heavy at 2.6 kg
- −Expensive
- −Cables stiff
Who's the Seasonic Vertex PX-1200 for?
Quick verdicts for the most common buyer profiles, derived from the sub-scores above.
Compute scores trail current top-tier — look at our step-up alternatives below if performance is the priority.
At $289 this is a genuine value play — Specdex score of 93 far exceeds the typical sub-$500 baseline.
In the box
What you get when you unbox the Seasonic Vertex PX-1200.
- Power supply
- AC power cable
- Modular cables
- Mounting screws
- Cable ties
Standard contents — region/SKU may vary; confirm at retailer.
Sources & benchmarks
Cited, not generatedSpecdex does not run benchmarks in-house. We're rolling out cited public benchmark data category by category — PassMark for CPUs and GPUs is wired today; DXOMark, RTINGS, Geekbench, and NotebookCheck will follow.
Sources we use when available: PassMark for CPU/GPU, Geekbench Browser for synthetic, DXOMark for camera scores, RTINGS for TVs, monitors, and headphones. See methodology.
Specifications
Editorial · awaiting verification| Specification | Value |
|---|---|
| Connectors | 1× 16-pin 12VHPWR (600W) |
| Specification | Value |
|---|---|
| Wattage | 1200 W |
| Efficiency | 80+ Platinum |
| Standard | ATX 3.0 |
Cheaper alternatives to the Seasonic Vertex PX-1200
Same category, at least 20% cheaper, best-scoring picks from our catalog.
Step up from the Seasonic Vertex PX-1200
Higher-scoring power supplies if you've got more to spend.
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Also consider
Where the Seasonic Vertex PX-1200 appears on Specdex
Curated lists, spec rankings, and buying guides where this product is mentioned or ranked.