Hi Clavus.
I would update the video drivers. If you are not sure of what version you have installed now, then it must be time to update. If you're unsure about the 4.9 betas (the drivers, not the fish) then just get the "known-good" 4.7 catalyst drivers here:
http://www.ati.com/support/drivers/w...=10&submit.y=2
The previous version will need to be uninstalled prior to installing the new ones. Go to the Control Panel and hit Add/Remove Programs, then uninstall the "ATI Display Driver." After restarting, install the new ones and restart again (whee.)
I think that should do it. Keep in mind that developers always get the latest drivers to develop with, which is why this should do the trick. Your RAM appears to be plenty.
Once you head down that elevator.....heh heh......