Fedora16 display problem

view story

http://forums.fedoraforum.org – I was using Fedora13 and upgraded it to Fedora14 using preupgrade. But while installing Fedora14, it threw unexpected error and machine did not boot. So I decided to install fresh Fedora16. Installation of Fedora16 was successful. But when I logged in, the screen size was unusually large. I tried display options. But I could not fix the issue. My PC is Dell Optiplex 780. I did 'yum update'. It too didn't help. Installing KDE will help? Or is there any way of using gnome-tweak-tool to fix my issue? (HowTos)