|1st of all, you can't compare Intel to AMD based on GHz. AMD CPUs are more efficient...that's why they use a PR (Performance Rating) number. A 4400+ single core Athlon64 CPU (if there was such a thing) would be roughly equivilent to a 4.4GHz single core P4.|
And although dual core is defintely the way things are going, there aren't many programs or games that actually benefit from it right now. Unless you're a multi-tasker, you will see little or no difference bewteen a single core & dual core peformance. But that WILL change.
In programs that aren't optimized for dual core, the X2 4400+ is roughly equal to a 3700+, either are better than a 3.0GHz P4.
Intel's new Core 2 Duo is a different story...it beats anything AMD currently has available! :(