the first time...no prep. i was scary
kept water at 65F running nb/sb/cpu/2 gtx295's
then i started getting a bit bolder and started seeing condensation.
so i made a foam cutout to put on and around my cpu block. and i wrapped the nb/sb with a sort of towel. and the gpus i just watched kind of close..and would let the system warm back up.
in the end...after selling the 295's i only have the cpu under water and the nb/sb under fans and have since been able to over clock farther.