Seasonic PRIME PX Spec and Price in the United Kingdom
The platinum rung of Seasonic's PRIME ladder, and the widest: PRIME PX spans 650W to 1600W on the same 210mm chassis, fully modular, with the twelve-year warranty the whole PRIME line carries. It is certified 80 PLUS Platinum at 92% efficiency at half load — one tier below the PRIME TX above it and one above the PRIME GX below, which is most of what separates the three. Buy it when you want PRIME build quality without paying the titanium premium.
No tracked price — this page compares specifications alone.
Specifications
- Wattage
- Efficiency
- 80 Plus Platinum
- Form factor
- ATX
- Modular
- Fully modular
- Length
- 210 mm
- Warranty
- 12 years
Wattages
| Configuration | Part number |
|---|---|
| 650W | — |
| 750W | — |
| 850W | — |
| 1000W | — |
| 1300W | — |
| 1600W | — |
Guides for this category
What owners and reviewers say
Summarised from 1 source(s), reviewed September 14, 2026. A source is counted only where it names this model exactly. How we track prices
Commonly praised
- The reviewer measured Cybenetics Titanium efficiency even though the unit is sold with an 80 PLUS Platinum badge.
- It can deliver roughly double its rated power in short excursions, satisfying the ATX 3.0 transient requirements at 1600W.
- Two 600W high-power connectors let it feed a pair of demanding graphics cards, and the twelve-year warranty matches the rest of the PRIME range.
Commonly criticised
- It is a large 210mm-deep unit, so case clearance has to be checked before buying.
- Its noise rating sits a tier below the Titanium model in the same family.
Sources behind this summary
Sources
Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.