Semi-finals:
Peach Bowl
Fiesta Bowl
Championship: New Orleans (Superdome)
My prediction:
Fiesta Bowl: Ohio st v Georgia (UGA beats LSU in SEC Championship)
Peach Bowl: Clemson v LSU
Championship Ohio St v Clemson
Edit: I switched locations of the semis. The committee wouldnt make OSU play UGA in Atlanta so they would put them in the Fiesta Bowl (Arizona) to avoid the home field advantage for UGA.