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Seasonic · Released Feb 2023

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.

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Seasonic Vertex PX-1200 — 1200 W · 80+ Platinum · ATX 3.0
Specdex verdict
Editor’s Pick

Specdex doesn't run benchmarks in-house. The verdict is an editorial assessment based on manufacturer specs and public reviewer consensus. See methodology.

Editorial · Specdex take
Pros
  • +Rock-solid ripple
  • +Platinum efficiency
  • +Long 12-year warranty
Cons
  • 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.

Power users and creators Skip

Compute scores trail current top-tier — look at our step-up alternatives below if performance is the priority.

Budget-conscious buyers Buy

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 generated

Specdex 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
Connectivity
Seasonic Vertex PX-1200 connectivity specs
Specification Value
Connectors 1× 16-pin 12VHPWR (600W)
Other
Seasonic Vertex PX-1200 other specs
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

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Where the Seasonic Vertex PX-1200 appears on Specdex

Curated lists, spec rankings, and buying guides where this product is mentioned or ranked.