I usually keep "smooth frame rate" enabled in UT3, and I get the full, unwavering 62 FPS in Throne with graphics settings sliders at maximum, at 1280x1024. I'll have to uncap it sometime and see what I can get in Throne. (I tested that in some other maps and I get between 100 and 130 in maps like Deck)
I get 20 FPS in Crysis with graphics settings all at "very high" (motion blur disabled... I hate that crap) at 1280x1024. I don't actually like Crysis except for the rich graphics, so I just play it in god mode to enjoy the scenery at maximum and take the 20 fps in the arse.
I have a Core 2 Quad Q6600, running at stock 2.4 GHz, with 4 Gb of DDR2 RAM and an 8800GTS 640 Mb that I overclock to 675/999 MHz for GPU and memory bus respectively. That's less than Jelle's specs.