and you've checked that it's on the correct resolution?also try both 1366x768 and 1360x768.
Revert back to the old driver
is it hdmi?
it could be overscanning
HDMI, ye.
to my understanding HDMI has a PC and TV mode. the wrong one will cause a blurry, saturated image. see if you can find anything about modes for hdmi in the catalyst control center.if that doesn't work try a dvi or vga cable. I had the same issue with one of my monitors and started using VGA to fix it. (didn't have DVI)
Have you tried unplugging the hdmi / turning it off and on again
Are screenshots also blurry? Send a pic
Nope, it's your screen.