I'm wondering because as I mentioned earlier I was considering upgrading last weekend. I did upgrade to the P4 3ghz. It's very fast, so no worries there, but it's pretty noisy. The company I bought it from has a 7 day, no questions, return policy. So I'd like to know before those 7 days are over two things. #1 - Are there any significant problems with running 64bit SuSE? Trouble compiling programs, trouble running certain programs, slower overall performance for business functionality, etc. #2 - Is the AMD 64 quieter? And I think what I mean when I ask that is if it runs less hot and thus the fan is quieter. I've heard this argument made. I'm wondering if there's truth to it. I could, of course, always go buy an ultra-quiet fan and heat sink. I've heard they make those and that may be the way I go because even with my new Antec Sonata the P4 is noticeably louder than my P3 was. Any thoughts are appreciated. Preston