hi!consider that you maybe have to clean your case from dust because sometimes if thats the case temperatures can go high,otherwise did you check if your gpu's fans are running and maybe need to be adjusted?Another step is checking to see if any overclock settings have been applied to the GPU which causing high temperature,just try to switch back to a normal mode and check it out!Also you should check if there is any latest driver for your graphics card and download it and then do a clean install of it!hope that helps