I see your point, one of the reasons that i bought the CRJ is the optimization for multi-cores CPUs. But on my pc, looks like the CRJ is trying to get more than my CPU can give and its causing lag when all cores load 100%. On Windows it works fine, but on linux my xplane runs really more smooth with a lot more FPS, so i'm giving a chance. I tried to turn v-sync on and it seens to help a little, but i cannot find a way to fix the framerate on 30fps. When i put to set "lock on half framrate" on xplane i get 19fps and its pretty unplayable. There is one way to fix on 30fps? Like the windows program "FPS Limiter". Thanks!