There should be something called catalsyt install manager or something like that, use that to uninstall, btw make sure you download the proper driver for your OS. such as 32/64 bit etc
OK, then shut down your pc and reboot, itll look funky with the windows drivers, but thatll be ok, cause you can then reinstall your old drivers off the cd or download the old ones or even retry the new ones from the same place, which is what Id do.
I installed new drivers. played L4D for a while, 1920x1080. Everything absolutely max (8x AA, 16x AF) with triple buffering.
Doing a FRAPS benchmark says that the Max was 63, min 43, avg 59.733. If i do recall, the min before the new drivers would drop into the low 30's during a hoard, so that has improved.
I am using a 4850, clocks at 700 core 1093 mem.
It also appears that the F@H GPU client does not yet quite support the new drivers? Anyone else have anything on this? Each time I start the core the screen flickers, but it is using the GPU/CPU processing power, so I guess that its running.