I was wondering if the thermal paste that comes with certain heatsinks optimize performance in that specific heatsink? I just replaced my retail intel heatsink with a Zalman CNPS7000A-Cu, I cleaned off the thermal paste from before and put on the thermal paste that Zalman supplied with its heatsink. But in normal mode my 3.0 Ghz P4 is running at about 43-45C. I want to reapply some new thermal paste to see if it makes a difference.....