Your 4 years old PC can render the UI on Windows fine though. When did you have to buy a new more powerful GPU for newer OS to work as it was before? See diffe

Your 4 years old PC can render the UI on Windows fine though. When did you have to buy a new more powerful GPU for newer OS to work as it was before? See difference between iOS 8 and 9, who introduced stuttering in two and one year old devices.