Nvidia driver conflict with HD Graphics

Question

NVIDIA

Windows 7 Ultimate 64-bit SP1
i5 3570k
asus p8z77-v lx
geforce gtx 660/Intel HD Graphics 4000
The essence of the problem is that the screen goes blank for 2 seconds during operation, and the system seems to freeze, and then everything becomes ok again. I don't know what to do anymore! The computer is new, before this video card, a Radeon hd 7850 was purchased. The problem was the same, but when entering video games, the computer hung tightly - a black screen, and crackling in the speakers. He took the video card to the sc, recognized the marriage. I exchanged it with a surcharge for gtx 660. Nothing freezes in games, and the screen does not go out! (probably just because the video card takes all the load on itself). But when working in the windows environment, the monitor goes out for 1-2 seconds, and then everything returns to normal again. What could be the matter, and how to find a way out?
Disconnected gtx 660, demolished Intel's firewood, installed fresh ones, downloaded from the site. When the dzhifors is not connected, the built-in Intel card works with a bang. Nothing hangs, there is no attenuation of screens for 2 seconds. But as soon as I insert the 660 card and install the drivers for it, this is how it starts ... The screen goes blank, and whatever you do. I don't know what to do anymore. I set the driver to 660 after installing the firewood on the Intel ones. But he couldn't get away from the problem. Also installed mvp.
As I understand it, the signal is given by the Intel card, and it shares the image with 660. What should I do? :-)