This message was posted on behalf of Intel Corporation
I understand that after Windows* installed an Intel graphics driver update your GTX 660 graphics card is no longer giving you signal.
Let me apologize for any inconvenience this issue may be causing to you.
In order to help you better I would like to gather more information about the configuration you have in the computer. Please attach to this thread the .xml file the Intel® System Support Utility will generate https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility
Do you have the motherboard BIOS configured to use both video cards at the same time?
To attach a file, you must click “Use Advanced Editor” on the upper right hand corner of the response box, then the “attach” option will appear on the bottom right hand corner of the response box.
I did so an updated the Intel drivers with it. Had no luck. BUT I fixed it. I tried connecting the GTX 660 graphics via HDMI to my monitor and it worked! Then I googled for the Displayport problem and a few hits later I found out that I had to disconnect my monitor (a pretty new ASUS monitor) for about 1 min from power. And viola! I get a signal from my card!
The guy I was reading about also has an ASUS screen...seems the DP does not react well to driver updates...
Thanks anyway and I hope this helps other people as well!!
Have a nice day,