Can you please provide this info:
Is the gpu fan working?
Have you overclocked the system/gpu?
Do you have a case with good airflow, meaning cables tidily arranged out of the way of an intake fan at the front transporting air through the case, over your components and out of the back/top exhaust fan?
How high is your ambient (room) temperature?
90 is the highest mark for the GPU which is safe and if the card is performing at this temp and you aren't experiencing and performance problems, it is not a big issue as these components can literally take the heat.