I acknowledged it helps any jerkiness. My point was that it doesn't increase overall average framerate or help loading time. So a lot of people might not want to spend twice as much on RAM without those benefits.
I was curious how much RAM Quake 4 used. Look at this:
[lvlshot]http://img.photobucket.com/albums/v140/Psyche911/153mb.jpg[/lvlshot]
153MB. That's it? While loading levels the most it hit was 172MB.
I'll try it later on high settings, right now it's on medium.