[kllrnohj]

Enthusiast water cooling would work for you, which if you're not comfortable with yourself you can get from people like Maingear.

But unless you need 4 GPUs, even just 2 GPUs with normal modern air cooling would still be reasonably quiet.

For the overwhelming majority of consumer-oriented products, you don't need water cooling to be silent (or near-silent). Those tower coolers and triple-slot GPU coolers are really good at getting rid of the heat in a noise-efficient manner.