I assume you're refering to the distortion line on the edge of the screen which runs along the bottom and right hand side?
If you only see this in this test in 3d Mark don't worry too much, your garphics card is being asked to do something that its either not fully capable of or the part of it which handles that function is damaged.
If you experiance problems in other programs and in Games then your card is damaged or has corrupt drivers. Things like poor visual quality, messed up textures or white lines/pixels indicate a damaged card.
It might be that the drivers you're using are not fully compatible with your card. If you're using ATI drivers check with the card manufacturer to see what driver versions they approve.
Intel core I7 920
6GB OCZ platinum 1600
Samsung 1TB F1 Spinpoint
Samsung SM2443BW 24"