can anyone...

there was an article on the net about an id guy saying that the "Frames Per Second" was maxed at 60fps in doom3.. does anyone still knows where to find this article.. i cant find it anywhere

I can confirm this, as the alpha version DOES max out at 60fps. Which is good, because 60fps is really all you need for a smooth game, and most monitors don't go above 70~80hz anyway.

Any performance above 60fps is only really useful when you run into a complex scene and your framerate drops down a few dozen frames.

The alpha only maxes out at 60FPS if you're not intelligent enough to prevent such.

1) Are you implying that me = teh dumb ?
2) Why would you want to "prevent" this ?

I'd rather not have the CPU process 80 frames of wasted stencils and focus on more important things...like dealing with the collision of 6 ragdolls spawned in the same coords. That about killed my computer.

The alpha doesn't max out at 60fps because I get 80fps when it is at the loading screens.

Just a dumb guess, but is it possible the game world ticks at 60hz, and thus any screen updates at a higher resolution would be pointless (it would be redrawing the exact same frame it just drew all over again)?

This post here http://www.rage3d.com/board/showthread.php?postid=1331554338#post1331554338 may give the answer.

Has to do with motion blur

"If this is so, does that mean you need to limit the max fps for this effect. If you could get this demo down to 2fps, would the motion blurs become extemely long, like a long exposure?"

Well, first of all, I'd try disabling Vsync...

And there's always com_maxfps.