My brother recently purchased this gaming laptop and while advertised to show 144mhz refresh rate on the panle, we cannot for the life of us figure out how to change the existing option which shows only 60mhz... asus was contacted and they have simply shown the route we have already been down to no avail... is it even possible to change the refresh rate as does not appear on the options? What are we doing wrong? Cheers for any help