Currently I have turned the integrated graphics to "Always Disabled" in the Bios. And am using the NVIDIA Card.
It is important to say that as soon as a PCIe video card is connected in the system, the onboard graphics are going to be automatically disabled.
Intel has a program called Lucid Virtu. This software provides the capability to the system to handle both resources at the same time. You can get the program at the following link: