And if the temps still go too high when using the appropriate Prime version, it may be that the heatsink was improperly mounted or pasted. Incorrect mounting pressure is quite often a source of high temps as is using too much or too little thermal paste.
Poor case airflow can also contribute. If you only have a single front or rear fan working, or in overclocked situations, even if you have both front and rear fans, which may not be sufficient requiring additional front or top fans, the airflow can make a big impact. CPU and GPU coolers don't work real well if they are simply blowing hot air through their respective heatsinks.