I am upgrading my CPU to a FX 8350. The current CPU cooler I have in my system is the Asktek LCLC, which I got as a free upgrade with my system. I was wondering which cooler should I use the LCLC or the stock? Also I read the stock heatsink comes with thermal pad already on it, so if I use that should I keep that one or go with the Arctic Silver I ordered with my CPU.