Assuming the Gophs are on the fringe of the top 25 - either at 24, 25, or just out of the top 25:
The TCU game is going to be very important. A win over another BCS conference school in the non-conference schedule could help the Gophs move up in the polls/national scene. A loss, and they could be on the outside looking in for the rest of the season, barring a big upset. I'm not saying TCU is a powerhouse, but they are a recognizable name, so a win over TCU counts a lot more than a win over "Directional State."
IF - and it's a big IF - the Gophs run the table in Non-Conf, they will still need to pull off an upset in the B1G if they want to move up in the ratings.