There are tons of benchmarks at many places, one of these is Anand's,
the latest one is
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2668 for high end
dual core stuff, but you'll find earlier ones including Prescott
there. Even without benchmarks I can tell you that your 2.8 in single
thread tasks (most games) will be identical to Pentium D 820, which is
nothing more than 2 Prescott 2.8 cobbled together sharing the bus and
chocking each other for the data. Both will be blown out of the water
by the cheapest A64 s939 - is it 3000 or 3200? don't remember off the
top of my head. Dual cores start showing their superiority only in
multithreaded apps that are still few and far between; or if you like
to work on your PC while scanning for viruses or encoding stuff in the
background.
NNN
