The Newegg.com - GIGABYTE GV-R695OC-1GD Radeon HD 6950 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card wouldn't fit inside his case.
The max cards that would fit inside the HAF 912 would be the radeon 6870, and the GTX 570, however, if you remove the hard drive cage, you can fit cards up to 11.5 inches long.