So you must optimize those video settings completely according to your needs. Sometimes your video setting in Dota 2 are too high and your system cannot bear that, which causes extra load on your Graphics Card and overall whole system too. Reset Texture and Render Quality Settings
Windows 8 and Windows 10 users to click the “ Details” tab.
Process Affinity can be changed very easily and it gives your game full power of your CPU and Processors. Sometimes Dota 2 does not use the full potential of your CPU properly and you do not get enough power to run Dota 2. This seems to be very geeky fix, but actually, it is not. It will start your game in safe mode with normal settings and most probably issues will be fixed.