Thanks for the info, I just fly single player with no weapons. What I found out is that I get that random hiccups when using the left weather option. When I put some clouds into my mission, rain, snow, etc. I get that hiccups. When I use dynamic weather its absolutely fluent and hiccup free. I think its because it is difficult to get heavy cloudy weather in the dynamic setting. For my end I really think its the clouds that gives me that hefty stutter every two minutes or so. There is so much going on with those clouds ... They pop up, change shape all of sudden, they throw weird shadows ...