I do remember that I played at 1024x768, High Quality and all settings in advanced options turned on except Vsync and AA. I vaguely remember the framerate, though. I think it was around 40fps, more or less, but I was very green at the time in terms of PC gaming expertise, and I believe I didn't even install the latest GPU drivers for this game, I simply didn't knew I should. The whole system wasn't particularly optimized, albeit pretty powerful for the time. Judging by the old benchmarks of Doom 3 running on 9800 XT, it should've ran better on my hardware than it actually did, especially since I didn't use anti-aliasing. I remember it ran better on my friend's 9800 Pro, which is a shame, to say the least xD
Doom 3 was more of an indoor corridor shooter, while Crysis was more open in its maps and it also was often outdoors. And also, Crysis had INSANE amounts of fidelity. Doom 3 also didn't have tons of enemies on-screen all the time, when compared to say the older Doom games and also compared to even Crysis.
Both were definitely cutting edge stuff, for their time period and all.
If anything, I think Crysis was bound to run worse than Doom 3, IMHO. Glad you got it running at an okay framerate, by back then's standards.
Both Doom series and Crysis series rock, IMHO.
Yes, it definitely felt OK, at least at the time I wasn't picky about that (unlike now, hehe). And I was amazed by the graphics. Stunned, even. Truth be told, to this day I marvel at Doom 3's visual presentation, it's simply my favorite.