I highly recommend uninstalling your current driver and then rebooting into safe mode, runnning a small program called Driver Sweeper, latest version can be downloaded here -
http://phyxion.net/Driver-Sweeper/Driver-Sweeper/Version-3-2-0/ - It is important to get rid of all traces of the previous driver as these could intefere with your new driver and potentially give you bugs or just knock your overall performance down.
Run Driver Sweeper, select your make of GPU I.E AMD/ATI Or Nvidia, analyze then clean, reboot into normal windows mode and then install the lastest driver for your graphics card, Having the latest driver for your GPU is quite important as these can improve performance quite a bit.
Its recommended to run driversweeper in safe mode so to start in safe mode type msconfig into your search box in the start menu, click on the icon, go to the boot tab and under boot options tick the box that says "Safe Boot", do this in reverse for when youve run driver cleaner and want to boot into normal windows mode.
Now its time to install the new driver -
Win 7 64 Bit -
http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx
And lastly is the cap for the crossfire profiles -
http://sites.amd.com/us/game/downloads/Pages/crossfirex-app-profiles.aspx
This is what i do every new driver release, takes a few minutes and eliminates any possibilities of previous driver issues.
Hope this helps