I already mentioned this in the "CPU Occupancy 95% " thread, but because it may be overlooked there I make a separate thread about it. I hope that that is not a problem. I found this article http://www.tomshardware.co.uk/faq/id-1939190/increase-fps-cpu-intensive-games-windows.html and tried the application that is mentioned there and can be found here: http://coderbag.com/Programming-C/CPU-core-parking-manager (which is the new beta version btw). Until now I also had the cpu warning very often, even on low settings and with no more than 10 AI opponents. After "unparking" all 4 cores of my Intel i5 4590 cpu with the tool, I haven't seen it anymore until now. Moreover I could increase the settings considerably without a noticable loss of fps. I tried a few races with the Fiat Abarth at Magione and 16 opponents and with Smoke Normal, AF 4x, AA 8x, I got FPS min. 57, max 94 and average of 76. So maybe it is worth trying ?