How to disable build in intel hd graphics 4000 video card on Dell Inspiron 3521?

Hello, I recently bought the Dell inspiron 3521 laptop.It comes with AMD Radeon HD 8730M.But it looks like the computer is not using it at all.Both video cards are with drivers up to date.
I tried with to disable the build in video card,but when I do it the pc starts using windows basic displayer and it is not recognizing any of the video cards.
I tried with different drivers for the amd video card both from the dell and amd websites,but without success.I also tried switchable graphics and any other options in the amd catalyst control center,but I didnt find any solution there ,either.
In the BIOS settings there is also no option to disable or set prefferable video card.
Does anyone has other ideas how to solve this problem.