SeaSonic G12 GC 650W vs SeaSonic Prime Fanless PX-450 450W

A side-by-side spec comparison of the SeaSonic G12 GC 650W and the SeaSonic Prime Fanless PX-450 450W. 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 G12 GC 650W and SeaSonic Prime Fanless PX-450 450W.
Specification	SeaSonic G12 GC 650W $133.91 Buy on Amazon	SeaSonic Prime Fanless PX-450 450W $421.00 Buy on Newegg
Modular	non-modular	full
Wattage	650W	450W
Efficiency	80+ Gold	80+ Platinum
Form Factor	ATX	ATX

SeaSonic G12 GC 650W

specs won

SeaSonic Prime Fanless PX-450 450W

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.

Open in interactive compare tool All Power Supply