The last quarter of hiigaran's guide shows how to create an executable text file, to permanently set the fans upon restart, but I sometimes run into trouble when i get to that point in the install. The most recent install I used "4" to just control the fans, instead of "28" in the guide, which is fans plus overclocking.
Regarding driver version for Nvidia, it's quite silly really. I've had to experiment on each install, with 381, 384, and most recently, 387 drivers. Either it folds or it doesn't. Try a different Nvidia driver if Mint doesn't fold.
Also, found a neat tool called PSensor, downloadable from the "apps" on that startup pop-up Mint has, that keeps an eye on temps and fan speeds of the system/GPU. It's the poor man's version of MSI Afterburner, at least for monitoring.
Regarding driver version for Nvidia, it's quite silly really. I've had to experiment on each install, with 381, 384, and most recently, 387 drivers. Either it folds or it doesn't. Try a different Nvidia driver if Mint doesn't fold.
Also, found a neat tool called PSensor, downloadable from the "apps" on that startup pop-up Mint has, that keeps an eye on temps and fan speeds of the system/GPU. It's the poor man's version of MSI Afterburner, at least for monitoring.