I own a 2010 Mac Pro with an ATI 5870 video card. I recently purchased a Dell u2711 monitor. As some of you may be aware, there is a problem connecting the Mac Pro with the ATI 5870 video card using a minidisplay to displayport cable. Apparently some cables result in no signal - like monoprice. This brings me to my question that I would love a detailed answer on.... Is their any visual downside to just connecting my Mac Pro to the monitor using a DVI cable? Is the video quality the same if I just use DVI? In other words, what is the difference in video quality between DVI and Displayport? If the answer is there is no difference in quality, I will probably just use DVI connecton anway, because it will free up the displayport in on the monitor for me to connect my macbook pro, which I sometimes like to have connected to the monitor if I want to extend my desktop.