Hey guys,I will be upgrading soon and i want to know what will be better a 7970 or 670 for 1920x1080 res BUT heres the catch.I will be doing alot of video editing with sony vegas 11 and i usually use my fx 6100 to render videos (It usually renders them in 1080p and about 1 minute longer to render than the accual video itself) but i wantt to know what video card will be faster to render with...670 or 7970?