See, I have the 550Ti (albeit without the Gigabyte board, I have an ASUS P5N-D) and it's showing as 16x, but with a link-speed of 2.5 GT/s also. With my card, I'm getting decent Luxmark scores, 2706 similar to Craigrox, but horrible FPS. In the Heaven benchmark, it rarely gets to 30, mostly...