Currently have the GD08B case with a Asus Crosshair V Formula-Z motherboard and Radeon 7950 Sapphire Vapor-X Boost.
Lists Dimensions of Card as
4.48 x 12.01 x 1.8 inches (W x L x H)
Radeon 7950 Vapor-X dimensions
4.53 x 10.83 x 2.05 inches (W x L x H)
I may have to move some things around in the drivebay to get the extra inch and quarter to fit in this case. The width and height of the r9 290 vapor x is smaller than my current card but im worried about the length
More about :290 sapphire vapor fit silverstone grandia gd08b case