Well, if both are undefeated, which is 90% possible (UM has a Thursday Night @ Cincy), you can almost bet on a 8PM game. GameDay will probably be in Tallahassee or Clemson. Only other games that are interesting are:
GT @ Clemson (both ranked, so maybe they get the 8PM)
UGA @ Tennessee (more than likely 3:30 game)
Oklahoma @ Texas (usually @11:30-12:00)