The graphics card at the top is a typical GeForce 8800 GTS while the bottom is the flagship GeForce 8800 GTX. The smaller GTS version's card length is typical of any other high-end graphics card such the GeForce 7900 GTX and isn't any longer than it. The lengthier GeForce 8800 GTX owes it extended figure to a more robust power circuitry design and is 26.5cm long. So if you're gunning for the top edition, check your chassis clearance first.