63 is pretty warm. You might not want to run it that hot. You risk it damaging it permanently! I would get a new heatsink and fan. What type of processor do you have. I'lll find you the best type to use. Also, use Artic 5 Silver Thermal Paste (it is extremely good). Give me what type of processor you have, and I get find you some really good stuff for it ok? Anywho, I wouldn't run that PC, unless you point one of your fans directly on the processor, that will cool it down some.