Completely passively cooled power supplies are absolutely a thing, but it's rare that you will find one that can deal with any graphics card up to, and including something so beefy as an Nvidia RTX 4080. Cooler Master has got your back with the X Silent 750W PSU it's been showing off at Computex this week.
The smart X Silent PSU in 750W trim has no fans at all and relies entirely on the passive cooling capability of the finned chassis and a copper baseplate with flat heatpipes helping dissipate the heavy thermals such a power supply will generate under load.
