The card is 9.5 inches long so all you would have to do is measure from the rear of the case to the hard drive rack and see if you have 9.5 inches or more.
Since you already measured it you should now measure it with this in mind, when a manufacturer gives the dimensions on a product they are going from point to point meaning the overall length. Keep in mind that the DVI ports stick out through the rear of the case and while it isn't much and the rear bracket mount sticks in the case a bit. So you want to measure from the back wall of the case and not the slot opening that juts into the case 1/2 inch.