The Core 2 Duo has reigned supreme thus far into our benchmarking and Quake 4 bears no exception. With just a processor change, the X6800 is able deliver more than 10fps over an Athlon 64 FX-62 and nearly a whopping 30fps gain in performance from the Pentium XE 965 in the single-threaded game mode. With SMP enabled, you'll notice that the Core 2 Duo's lead has been reduced slightly, but that still doesn't take away the fact that a 2.4GHz Core 2 Duo in the near future will give you better gaming performance than your friends hyper expensive Athlon 64 FX-62 or the rather gimped Pentium XE 965.
As expected, F.E.A.R. is a game that is more graphics intensive, which is why you do not see any difference in performance. Even on a GeForce 7900 GT, the game is already graphics bound at 800x600 with maximum quality settings. If you want more performance out of F.E.A.R., getting a new graphics card will do you more good than upgrading or overclocking your processor.