I'm getting conflicting data as well. Best I can advice here would be to look at this
YouTube video. At about the 2:10 mark, pause a take a look at the interior of the case being used. You'll want to use a tape measure to measure the length from the openings at the back of the case (where the video card DVI/HDMI ports would be) all the way to the right to the first obstacle. In this example, that would be the hard drive cage
Now as long as the card is shorter than that measured distance and there are no other obstacles in the way (such as the CPU/Heat Sink), the card will fit.
Unless you can post some images of your case interior and rear of the case, I can't help you any further.
-Wolf sends