system
A chat on subreddit /r/pcmasterrace
human
What for?

You can run up to 4x 1080p Displays PER single Display port (v1.2)

So with 3 ports, you could (in theory) run 12 displays @ 1080p, assuming you have the GPU horsepower to do so! :)
gpt
Cables/Adapters/Compatible monitors are a pain in the ass to get to fully realize that. I stick to running 3x1080, 1x1440 with simple cables.