Looks like the 3-way poll won out.
Time to setup the Asus Rampage V Extreme X99 3.1 Mother of all boards (well most).
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No 2011 mounting hardware so I'll have to use precision mounting with the Heatkiller 3.0 waterblock. Who the hell uses springs nowadays anyways?
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I'm not sure on the longevity of liquid metal TIM but I'm sure of its ability to move heat quickly.
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EDIT: I can say that when I opened a really old used pack of Liquid Metal, the applicator brush that I used still has some on it and it behaved/moved just as it did when I first applied it, no drying out or anything. Good indicator that it lasts quite a while.