Hi,
I have an AMD Phenom II X2 550 that I unlocked one of the extra cores so it's an X3(fourth core is bad). Right now I have the thermal paste that came on the heatsink, but should I remove that and put some AS5 on it?
If you are talking about replacing the paste on the stock HS with something else...I doubt your going to see much change, stock HS's are not made to handle OCing, you need to be looking at an aftermarket HS and not just TIM replacement.