Thanks for the inputs guys. I don't have the NOAA plugin ; both log files are attached under the post. My settings : http://www.hapshack.com/images/DzWTF.png (in french so here is a translation) - compressed textures on, resolution on very high, fps unlocked - trees filled in, objects tons, roads tons, cars none - distance details high, airport details extremes, shadows 3D on acft, water low - 3D relief, gritty textures, volumetric fog all on - pixel per lightning, HDR, atmos. scattering all on - 2x SSAA+FXAA, aniso. 8x Thread optimization and maximum performance power mode did not solve unfortunately. Thanks Corsair GizmoLog.txt Log.txt