If as you say the fan was not running as it should whilst gaming,then using afterburner was not the way to go, it is more likely a faulty card/fan. It is not always necessary to update drivers just because they are the latest,some times an updated driver just addresses a particular problem which you may not have, so there is no need to update just because a newer driver is out. As for your card, check that the fan is clean, remove it and use a soft brush then make sure it is reseated firmly. Remove all Nvidia drivers and then reinstall Post back.
What is ransomware and how do I protect my PC from Petya?