i run in my new phenom x4 BE 9400 and i get upwards of 60 fps with everything turned up, i have noticed in certain areas where shadows/smoke are heavy that it does dip down into the 20s and 30s. Im fine with 24 to 30 frames as that seems fine for any game i play.

on my slave machines they use d a 8800 gt and get around 12 fps (maxfps Set limit) on each of the 4 slave windows, i do notice/watch my CPU while doing this, as my tempature and processing overtime gets heavy, my frames will dip down, but thats due to a number of reason.

So in other words, try your 9800 :-)