Hello, i have a amd rx 570 graphics card currently with amd freesync on connected to a acer kg271 monitor and ive had a blackscreen for like 2 days, yes i use to get blackscreens but only for 2 or 3 second, but it has bee like that the whole day, also my monitor use to turn to sleep when it happened and now it just stays on, is my gpu dead?!