Game is like a " broken mirror "

[pweaks]

Have you updated your graphics card drivers?

I was going to say you should try fiddling with minlod and lighterror, but if it's a problem in other games, it probably won't fix it.

http://www.nvidia.com/Download/index.aspx?lang=en-us
Here I should do it, but I don't know which product and product series I should pick?