i had big stuttering frame drop in SP when there are smoke or burning.
some in MP ,thank god only couple of maps stutter (nothing unplayable but damn annoying especialy in Mp cmon)
and it feels like its not giving the performance that it should,
its very bad comparade to cod4:mw i had STABLE 100-125 fps there.
the game uses all the cores nicely and so does the GPU the utilization is around 90-100%
my rig is phenom at 3.1 ghz (4cores)
ATi 4870 / 512
4 gb ram
im hoping for a magic Driver fix from ATi or IW.