A long time ago, I had to install a second video card in my old computer to get dual monitors. When work sent me a new computer, with much small chassis, it was clear that a the video card solution might not work. That's when I found this cable. So much easier. Plugged it in and was up and running. I've had it for a few weeks now and really there are no problems, I don't experience any lag between the two monitors, etc. Definitely worth it.