FiringSquad has a bunch of benchmarks of an Intel Core 2 Duo based system:
Being across the world in Taipei at Computex presents many interesting and unique opportunities. One of these was our chance to sit down with an Intel Core2 Duo system - with no Intel representatives around. We had several unsupervised hours to fiddle with the system, running artificial and real-world benchmarks. To top it off, we also tested against an AMD Athlon 64 FX-62. Keep in mind that the Core 2 Duo Conroe system is running at 2.4Ghz vs. the FX-62 at 2.8Ghz. Both are equipped with ATI's X1900XTX graphics card, both running Catalyst 6.5 drivers. Finally, we managed to overclock the Core2, though we ran out of time before we could do more benchmarks.