as the subject says, I am a novice when it comes to GPUs. I currently have a 2016 15" MacBook Pro that has a snow effect when switching desktops, while watching movies. I came from a 2012 15" MacBook Pro that had pretty much the same issues. Both would also scramble when switching desktops. This isn't an all the time occurrence but it does happen quite a bit. Now, my question, is this caused by iGPU or dGPU? I am confused but which is causing the trouble. I keep reading that dGPU is what's causing some issues. any real explanation would be helpful, since I am taking this one in this week. thanks in advance!