We use cookies to understand how you use our site and improve your experience. Privacy Policy

SeaSonic S12III 450W vs SeaSonic X 400W

A side-by-side spec comparison of the SeaSonic S12III 450W and the SeaSonic X 400W. We line up every specification, highlight the winner of each, and tally an overall verdict so you can decide which power supply is right for your build.

Side-by-side specification comparison of SeaSonic S12III 450W and SeaSonic X 400W.
Specification
Modularnon-modularfull
Wattage450W400W
Efficiency80+ Bronze80+ Gold
Form FactorATXATX

SeaSonic S12III 450W

0

specs won

SeaSonic X 400W

0

specs won

As an Amazon Associate, PlanMyPC earns from qualifying purchases made through links on this page.

Compare more parts

Add a third or fourth power supply to this comparison, or build a side-by-side from scratch in the interactive compare tool.