Intel Core i5 750 @ 3.6ghz
4gb ddr3 1600mhz GSkill Ripjaws
Sapphire ATI Radeon hd5770
Drivers up to date (Catalyst 10.6)
Windows 7 Ultimate
Im running all my 3d edition applications, as all of the most powerfull games with no problem.
EDIT:
I have modified the camera near range in the atmosphere properties (default value was 0.1, i have tried a lot of values like 0.01,0.2,0.3,etc), but the problem persists =/