DOOM 3 Capped on IGN (thanks Frans) relates a tidbit about DOOM 3 gleaned at a recent NVIDIA editor's day, where they learned that the game will be capped at a maximum 60 FPS framerate. They quote id's John Carmack on the reason for this.

"The game tic simulation, including player movement, runs at 60hz, so if it rendered any faster, it would just be rendering identical frames. A fixed tic rate removes issues like Quake 3 had, where some jumps could only be made at certain framerates. In Doom, the same player inputs will produce the same motions, no matter what the framerate is."

In a mostly unrelated note, we'd like to thank IGN for doing a story today on DOOM 3 and NVIDIA (who prefer their name be shown that way in print) to help celebrate INTRNATIONAL CAPS LOCK DAY.