I have in my system a fully water cooled silenmaxx psu. Unfortunately both the psu and water block are pretty scarce. The other drawback is that I am limited to 600 watts.
That being said having a fully water cooled psu is very nice, they are quite, and there is nothing to clog up so I feel comfortable having my pc on the ground. Having large radiators my pc is almost completely quite at full load.
The only other option is the hybrid air and water supply. Its pretty undesirable because it still has a fan, and to be honest the concept of a hybrid psu seems pretty pointless to me.
I feel as though the task of modifying say an evga power supply to be fully watercooled would not be all that difficult. My stab in the dark would be to first machine a copper waterblock to directly cool the fets on the board, thus replacing the aluminum air cooled heat sink. Then next step would be to snake copper pipes with fins close to all the other heat making components, and potting the entire psu with thermally conductive epoxy.
There is kind of a hole in the market as far as watercooled psu's go given that you can water cool ram and ssd's this seems like something that would be more prevalent...
Any thoughts?