I heard somewhere here the tiebreaker for the Big 12 title game is head to head if it's two teams and highest BCS ranking if it's three teams that all are 1-1 against each other (that would be the case if Tech wins against Ok St, but loses to OU). OU would probably be the highest ranked there and move on to the Big 12 title game. IMO there should be no way you get to play for the title if you don't win your conf, so any team that doesn't make their conf title game is done imo.
Texas needs Tech to lose this weekend AND lose to OU. Not sure why people are saying they need them to win against the Sooners. If Tech loses the next two weeks then Texas will win the Big 12 most likely. That will leave them with one loss, Tech with two losses, ok st with one loss, and ou with one loss. OU and Ok St still play each other so the winner will be tied with Texas for the Big 12 South, and Texas beat both of them, so they would take the tiebreaker. Only way Texas has a chance at the title is if tech loses two weeks straight. That's the only way I see it happening.
Either way though I think Florida and Penn St are playing for the title unless one of them lose.
Only teams with title chances are: UF, PSU, Alabama, Texas, Tech, OU, and USC. Every other team is eliminated pretty much. The team that needs the most help is USC because they need the North to win the Big 12 and Penn St to lose a game, then they would play bama or uf for the title.