Just got my GTX770 in today, hooray! ^.^
I know that it seemed hardly an upgrade from what I had, but I really think something was wrong with my 680 since I kept having so many issues with it and games (bad drivers or broken hardware idk, but freezing and artifacts was a normal thing.) The 770 seems to perform perfectly though!
Tossed the 680 in the media PC, which it seems to be doing fine in...