currently my system is Asus p5q deluxe e8400@ 3.6ghz 4gb of G.Skill RAM hd4870 oc'd
I would say that is a lower end of the high end spectrum of gaming rigs.
Now I'm not sure if I'm receiving the proper results compared to benchmarks i have seen online for games such as Crysis. I recently updated to the catalyst 8.8 drivers yet in Crysis on a mixture of very high to high(mostly high) settings with 2x AA I'm receiving pretty mixed results. I'm ranging anywhere from 15fps to 45fps. The average I would say would be around 26fps. Compared to benchmarks online my rig is under performing though most benchmarks online use a quad core CPU, i doubt it makes much of a difference.