Hi everyone, in some games (Skyrim, Morrowind, Bioshock infinite for example) the day-night transitions and the evening itself are not as they should. appear many horizontal lines across the sky that takes away all the charm of the night.

I've tried removing and adding mods, changing monitor and review my graphic options (GTX 550 Ti) with no results.

http://img534.imageshack.us/img534/5491/2013052200005.jpg

There're any fix? Thanks in advance and sorry for my english, im not native.