7970 ghz in Sony Vegas

Hi Everyone, I am having trouble rendering with my GPU in Sony Vegas 12. I have a 7970 ghz and every time I go to render it turns out all blocky and weird. In the link are the pictures of my setting and render settings and what it looks like when you attempt to render. I was able to render the video if I turned off the GPU acceleration. Any help is much appreciated! Thanks!


I don't really edit video but are your drivers up to date?