I think I have a fairly good system for TS12 :Windows7 Home Premium 64-bit, Intel Core i5-3570K, CPU @3.4 GHz, 16 MB RAM and a NVida GeForce GTX 660 video card but on some of my routes I get some stutter and when switching views some pauses which can last up 10 seconds. Other than the problems with the stuttering in Trainz my system is running fine. So my question is do I upload a new driver or tweak the card that I have? Which leads to another question. Opened the NVida Control Panel and under Manage 3D Settings there are a number of items which I could change BUT I'm not sure at what settings I should be running Trainz on. If someone who is knowledgeable has any suggestions I'm ready to give them a try. As of now most of the settings are on what they refer to as Global or what I think of as default. Any insights, suggestions or knowledge will be appreciated.