I have an i5 2500k and i7 4770k, both are stock settings, but pretty old now. The 2500k was overheating in its machine for some time, reaching over 200f at times. I applied some new compound and it did nothing. I've chalked it up to a lost cause, as it was a secondary machine. However, recently, my primary 4770k machine has been reaching max temps at 100c before being throttled when doing almost anything, and simply running Windows has it at 70c+. I again applied new compound to no avail. I'm thinking about getting a delidding tool, some liquid metal and good compound. Is there anything I should try doing before delidding these cpus? Is it even worth it? If it is, if only for the experience, what supplies do you recommend?