Is 750W PSU enough for RTX 3080
Expand. According to Seasonic''s PSU Calculator, they recommend 850W PSUs for the 12900K + RTX 3080, their calculator don''t have the 12900KS which has a higher TDP, so it could use more power. In addition, this did not factor in your other components, such as fans, RGB lights, hard drives, SSDs, etc.