Fraps can do more than that. I use Fraps full that has a very nice benching utility. It logs 3 files, one of which shows your fps every second. Another shows the minimum, average, and Max FPS during your benching time. You can also set it to bench for a predetermined number of seconds so you don't have to stop it your self. Picking the right games/levels/paths you can pretty much get almost identical scores over and over and give you a pretty decent real world gaming comparison.
ABIT IS7, P4 2.6C, 1GB Corsair XMS 4000 Pro Series, Radeon 9800 Pro, Santa Cruz, TruePower 430watt