Conductonaut is the liquid metal. Kryonaut is the paste. I'm not sure how long the LM will last, so good question.
*I've delided and I personally don't recommend it. Sure, you gain good temps but you don't really gain much speed. You're already at 5.0GHz. That's all you need. Too many things can go wrong. What about when you want to sell it? It's just a messy thing to do.