Hey guys,
First of all, my specs:
i5 4460
R9 270X 2GB
8GB RAM
I´m on the gang of "sometimes the game works amazing smooth, others are stuttering"... so, i discovery a fix, for me.
If u ente in the game and have stutter, go exit and close Steam, go to Control Panel\Network and Internet\Network Connections and DISABLE your conection. Play the game, Steam, of course, will be unable to connect, but game will working perfect without any stutter.
So, this tip only works for offline carrers and games.