63C? Damn guy, you really need to cool that puppy down a bit! Regardless of what the manufacturers say, 50C has always been my upper limit. If I can't get it to run cooler than that, forget it. If you plan on keeping that CPU awhile you really should consider either backing it down some, or having a better cooling solution. Sure, it may be stable now, but at 63C how long do you think that's gonna last?
I'll be glad to offer further comments/advice if you want it.