Here is my MP setting and my PC configuration. Graphic setting in game is set as full. Only color corection is off. Not for performance but better colors.
"generals" : { "development_logging" : true, "drivers_animations" : true, "fast_assets_loading" : true, "season_effects" : false, "smoothing_distance" : 400, "use_lods" : false }, "graphics" : { "additional_lights" : true, "avatars" : false, "draw_distance" : 400, "draw_drivers" : true, "dynamic_shadows" : true, "fake_shadows" : true, "force_low_details" : false, "headlights" : true }, "mods" : { "winter_mod" : false }, "sounds" : { "engine" : true, "gearbox" : true, "horn" : true, "lift_axle" : false, "master_volume" : 97, "music_volume" : 97, "reversing" : true, "sound_effects" : true, "sound_effects_volume" : 97
PC
System version: Windows 7 Ultimate, Service Pack 1 System Type: x64 Processor: AMD Phenom ™ II X4 840 Processor 3.20 GHz System Memory: 4 GB Graphics card: nVidia GeForce 9800GT
Change "force_low_details" : false,
"use_lods" : false
install DirectX 11
Download MalwareBytes and check your PC for malvare.
Run only ETS2MP and Steam. All others program and aplication turn off.