Hackintosh boots to no display with 4 screens connected.

Specs: i7 3770, gtx 1070, Sierra 12.4, 3x 22" 1080p monitors, 1x 23" 1920x1200 Cinema HD Display.

I recently bought an Apple Cinema HD 23" display really cheap, but when I have all 4 displays connected, after the Apple Logo, the screen goes blank. If I boot the computer without the 4th display connected, it boots fine. I can then plug in the 4th monitor and it works perfectly.

What could be causing that?