Reports are showing that the 180.43 drivers increase 30% On FC2.
Plz note the beta drivers do conflict with Fan controls. so i would wait till a final release. these drivers are BETA.
Installed them last week, they are pretty good, no noticeable improvement for S.T.A.L.K.E.R. Clear Sky, but they seem to run Far Cry 2, Dead Space and Mercenaries 2 pretty good. Here's a video of Far Cry 2 running the 180.43 drivers.