Strange system lag and block deformation

[kable784]

Hi everyone,
ive got a problem, when i move my camera, the game starts lagging badly. Also the sides of the blocks flicker so they look
like they are made of triangles. Setting resolution to lowest fixed the lag, but the blocks still flicker. I tried everything, even setting the process priority to real time, but nothing worked. If you know a fix, please tell me.
Ive got 6GB of Ram and my video card is a nvidia Gforce 9500 so i dont think Thats th problem.

[TheAceOfHearts]

um im not sure if this helps but if you have a dell right click your desktop image and click properties then go to setting>
Advanced>Troubleshoot> and set it to 3. works with all indirect draw fails and block flickers. also try reinstalling the game. hope i helped. :D