SeaSonic S12III 650W vs SeaSonic SS-400ET Bronze 400W

A side-by-side spec comparison of the SeaSonic S12III 650W and the SeaSonic SS-400ET Bronze 400W. We line up every specification and score the ones that matter most in this category — weighted, not a raw count of specs won — to reach an overall verdict so you can decide which power supply is right for your build.

Side-by-side specification comparison of SeaSonic S12III 650W and SeaSonic SS-400ET Bronze 400W.
Specification	SeaSonic S12III 650W No price data Winner	SeaSonic SS-400ET Bronze 400W $108.02 Buy on Amazon
Modular	non-modular	non-modular
Wattage	650W	400W
Efficiency	80+ Bronze	80+ Bronze
Form Factor	ATX	ATX

Winner: SeaSonic S12III 650W — driven by Wattage (650W)

SeaSonic S12III 650W

performance points

SeaSonic SS-400ET Bronze 400W

performance points

Winner is scored by weighting the specs that matter most in this category (not a raw count of specs won).

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