Dual montiors won't work

[blazerfx]

Hey guys,
I'm new at building hackintosh.
My first build run fine. But i can't use my second screen. I have a GTX 660 with webdrivers. My Main monitor (works) is connected with HDMI and my second (don't works) is connected with dvi.

 

[aol]

Assuming you are on recent Sierra build and that "about this Mac" is reporting what seems to be proper values for your video card (and not, for example, 7MB) indicating the graphics driver is loading, my main suggestion is to try hot plugging the second monitor. Boot with just one monitor, and at the desktop, plug in or turn on the second monitor, and try different combinations of this. I'm not familiar with limitations of the 660 GPU but this advice sorts out a wide variety of issues.

Secondarily, if your SMBIOS is _not_ iMac 14,2 you might consider changing it to iMac 14,2, as this SMBIOS seems to have fewer GPU issues in general.