The AMD will out perform the Intel's 3 GHZ cpu, see the FAO: All Pc Gamers thered started in General Discussion by Tony Turbo.
If you're comparing AMD vs Intel then the AMD 64 bit will outdo the Shonky P4.
SOme things too look at
http://www.amd.com/us-en/Processors/...5E9492,00.html
http://www.amd.com/us-en/Processors/...5E9503,00.html