Depends on the game.
for example, a no-brainer like Bloodrayne doesnt require much in the way of cpu calculations even
with full eye candy, so its fast on most machines that have a 9800 pro. Lock-on is about the most
cpu intensive game I have played recently, and you are lucky not to dip below 25fps whatever your
system.
Best advice by far is to have a look at the recommended (not minimum) specs for a few games you can
see yourself buying, and build/buy hardware in that ballpark.
Having said that, my current CPU is a XP2100 (driving a Radeon 9800 pro). Although I know its the
limiting factor in my system, most games do not seem to be that limited when I play them, so I feel
no need to upgrade
It also depends on the resolution. If you increase the resolution to silly extremes, then
obviously, your GfX will slow down, and may become the bottleneck.
S