EVGATech_AdamBYes, unfortunately the use of liquid metal will inevitably end up voiding the warranty as typically it will instantly short the resistors surrounding the GPU die. Usually, what people will do to prevent this is to put a clear nail polish around the GPU die to try to protect it, but the use of nail polish on the card would void the warranty. Also, since liquid metal can eat away at both the cooler and the GPU die that would be considered physical damage to the card. In general, we strongly DO NOT recommend using any liquid metal on the card.
austin86Cleaning it off can be a pain ...
ty_ger07austin86Cleaning it off can be a pain ...The staining cannot be removed without removing some metal off the surface of the heatsink. The staining is effectively a plating. So, as far as the warranty is concerned, it is impossible to return the heatsink to its stock form if the stock heatsink has been in contact with liquid metal.