I've been reading a few posts here on the subject of CPU upgrades for the MacPro and was hoping to get some advice. I thought philipma1957's post upgrading his single processor was really interesting. Very thorough and encouraging. I hadn't thought of upgrading until I saw OWC had this upgrade program but it seems to me a bit pricy, and currently living in Europe I think its a no brainer that I'm not going to send the brains of my machine to the US for an upgrade due to cost - so hence I'm thinking at doing the home job like philipma and some others here who have taken the plunge. My questions are: 1. Is there a list of compatible CPU's for my machine somebody has maintained I can't find? 2. What currently provides the best overall value for the money? 3. Did anybody ever have problems with that overclocking program from a while back? I used it on my old 2008 model mac pro but have not thought about it on this machine yet. I couldn't find anything about whether it is usable with a 2010 model. Thanks for your advice!