I have a computer I built. Two identical monitors are plugged into the motherboard on-board graphics. The two displays are Dell S2340M. 
The motherboard is GA-Z87X-UD3H and the processor is i7-4770k. I used to have a graphics card, but the HDMI out on it broke, so now I have my two displays plugged into the motherboard. One is plugged in through HDMI. The other through DVI. 

The display plugged in through HDMI is working perfectly. The second one, plugged in through DVI is not. It is blurry, aliased, and everything looks on it as if it's not 32bit color.

I also run mac on the computer, and I found the following article which sounds like the problem I'm having:

<http://www.mathewinkson.com/2013/03/force-rgb-mode-in-mac-os-x-to-fix-the-picture-quality-of-an-external-monitor>

How do I force RGB mode on the display or trouble shoot it? The resolution is correct, but I think windows 7 is treating it as a TV versus an LCD display. 

Good display:

[![enter image description here](https://i.stack.imgur.com/zc14Q.jpg)](https://i.stack.imgur.com/zc14Q.jpg)

Bad display:

[![enter image description here](https://i.stack.imgur.com/aCkPk.jpg)](https://i.stack.imgur.com/aCkPk.jpg)