I haven't been able to find any benchmarks so I can't tell ya for sure, but I'd feel safter getting the A64 4000+, over the 3.8ghz P4, as high end prescotts are very very difficult to keep cool. I had to go to water cooling to keep my 3.4ghz prescott from overheating..I can't say for sure about this either, but are you sure that program needs such a high end CPU?