That is just a myth man, the liquid up market systems use are non conductive which means your system will still function even if its submerged in it. The main concern for me is the lack of thermal management software in some of the cheaper ones. The more expensive ones shut down windows when the pump fails but most of them don't have it, so if the pump fails, the components will still heat up like crazy, I have a pic of a copper graphics card block that cracked when the pump failed, the card of course died and the system was saved bar the graphics card by the thermal management of the CPU. Now the melting point of copper is pretty high, so the GPU must be at crazy temps to cause the copper block to crack.