I used amino acid sequence to predict the 3D structure with I-TASSER.
I obtained 5 models but were not ordered according to their C-score :
Name C-score Exp.TM-Score Exp.RMSD No.of decoys Cluster density
Model1: -3.21 0.36+-0.12 12.5+-4.3 1700 0.0561
Model2: -3.09 1568 0.0634
Model3: -2.96 656 0.0723
Model4: -4.76 404 0.0120
Model5: -5.00 390 0.0091
Are there other criteria used for ranking ?