That is so awesome wow,I was wondering when water cooled ram was going to come out!, Why not just throw your computer in the water and call it water cooled lol!
as far as I know it's not totally silent. There is still a fan which makes the water circulate. And also it's pretty hard to cool your psu with water cooling, so most water cooled pcs still have a fan on the heatsink. But it's still a lot more quiet than air cooling.