If u install newest driver software u should be able to force using NVIDIA graphic card only, via NVIDIA control panel options :tup:
1 - Manage 3D settings/preferred graphic processor/High Performance NVIDIA processor
2 - Set PhysX Configuration/select a PhysX processor/NVIDIA GeForce GT(X) XXX
Also u can run ur apps using right click/run with graphic processor/NVIDIA
For example PES14 says in both cases that game is using integrated graphic, but shows different results and performance while playing. Are you sure that u can't see differences?