I have two monitors. The main monitor is FullHD, works via HDMI. The second HD monitor works through the VGA. Connection diagram: The main monitor is connected to the HDMI video card, the Second monitor is connected to the VGA motherboard.
Previously there was a GTX 650, and an I3-3210 - everything worked. Now I installed GTX 1660 and I5-2400 - both monitors do not want to work at the same time.If I set the BIOS priority to the integrated graphics, the second monitor works, the main one does not. If I do the opposite, the first monitor works, the second does not.
Replacing with an old CPU did not help. The new video card does not have a VGA output. I heard that both video cards (built-in Intel Graphics 2500 and GTX 1660) cannot work at the same time. What could be the problem?
Note: I did nothing to the system when replacing hardware, only installing a new driver for the video card. OC Windows 7.