For Dolphin the 480M would be way faster than the 740QM, it's basically 3GHz vs 2GHz
Clevo P151HM1 | [color=#87CEEB]Core i7 2760QM @ 3.2GHz[/color] | [color=#32CD32]NVIDIA GTX 560M 1.5GB[/color] | 8GB 1600MHz RAM | [color=#4682B4]Windows 7 Ultimate[/color]