Check for overheating issues with the proper softwareCheck for driver updates (not just for the GPU but all your hardware, especially the motherboard)Do a check for corrupt Windows files: https://support.microsoft.com/en-us/help/929833/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system (if all else fails, try a Windows repair) Thank you for the suggestions but I tried those when the problem arise for the first time. Eventually I gave up and the problem fixed itself. Now I'm playing for an hour and everything is fine. So I do not think it's related to hardware or software rather than connection. I'm dealing with millions of polygons and render a lot daily. No issue with those heavy tasks. Also sometimes guild wars 2 stays open during those processes with no issue for hours.