No prob... I did the same thing with my Athlon64 last night... I've done it before, so I knew it would work and not damage anything... I also use denatured alcohol to clean both the heatsink and processor. That way, I'm 100% certain none of the old compound is on either. Granted, most people don't reuse the stock heatsink, but some do. If I could find a good use for mine, I'd use it... It just can't compare with the large hunk 'o copper that I've installed.