We would need to know if that is a P4a, P4b, P4c, P4e, or a P4 prescott-a
If it's a P4c, it will be a little slower in gaming (about 15% fewer frames) but better @ some video encoding.
Any of the other chips would be worse by varying degrees.
In gaming, add 200 to the Amd to get it's Intel equivalent speed. ( an A64 3200 games as well as an Intel 3.4ghz)