I am in the process of assembling my new rig. I've purchased a P8Z68V Pro and a i5-2500k. I don't plan to over clock and planning to install the stock CPU cooler fan that came boxed with the processor. The FAN itself has a copper base with pre-applied thermal paste. Do I need to apply any additional thermal paste or will this be sufficient?
also how often do I need to apply the thermal paste between the CPU & cooler?
No you do not need to apply any thermal paste with the stock HSF (heatsink/fan) it should come pre-applied to the HSF. You will want to re-apply thermal paste whenever you remove the HSF otherwise you shouldn't need to worry about it.