Technical help with display

Whenever I play the game, the earth doesn't seem to render right. Has anyone encountered this before?

i7 Processor 2.7GHZ 6 gig ram Windows Vista ATI Radeon HD 4800

Now that I'm typing this, I noticed that the specs for game call for a higher video card, is this issue? Thanks for your assistance.

http://i.imgur.com/ze9G5hB.jpg