Seasonic Prime Fanless 700 W @ TechPowerUp
 

The Seasonic Prime Fanless 700 W certainly isn't cheap, priced at $265, but it offers a unique capability. Completely noise-free operation, thanks to a passive design. With over 93%, efficiency is among the best we've ever seen, but there's also some issues.

https://www.techpowerup.com/review/s...fanless-700-w/