Am changing my HSF from the standard one that came with the retail A64 to a thermalright XP-120 with a Panaflow 120mm fan 88CFM @ 30db. My case is an Antec Sonata. i just need to ask about 1) cleaning the CPU of the previous thermal grease and replacing with AS5. and also, i wanted to ask if the fan specs are ok....(noisewise and cooling wise) thanks!!!