While all of the 3c methods produced fairly accurate energy orderings of the conformers, the differences in binding energies were more pronounced. In the gas phase, B97-3c showed astonishingly close agreement with the ωB97X-D4/def2-TZVP binding energies, with most energies within 1 kJ/mol (MAE 0.5 kJ/mol) while the other 3c methods differed by 3 kJ/mol or more (MAEs range from 3.4 to 6.6 kJ/mol). B97-3c was also the second fastest method, taking an average of just 357 core-seconds (six core-minutes) on a single core to compute a single-point energy for a pyrene dimer. Only HF-3c was faster.