I lost a card a few months ago to condensation. I wasn't home and the Internet went out. The cards got very cold and condensation happened. The lost card was using an XSPC block, all EKs were OK. For this I try to no longer use XSPC, they sure have a condensation problem.
How do you deal with the condensation? Faucet water is much colder than ambient temps
I am not saying he is doing this but with a heat exchanger you can make the GPU loop any temp you want. Keep GPU loop's flow fixed and adjust the cold side loop (the cold water -> heat exchanger -> drain) flow so that it pulls enough heat from the hot side (GPU loop) to cool it down but keep it above ambient.