Dunno if it's the software or the GPU firmware, but my FTW3 Hybrid started hitting super high temps and throttling like mad during a Destiny 2 session. Checking Precision showed that the fan on the card was at 100%, but the fan on the radiator was only 34%. Core temp was pegged at 85C and mem temps were 83C. This doesn't happen all the time, just on occasion after the computer comes out of sleep, and generally restarting Precision seems to fix the issue.
EDIT: So I did some testing. For whatever reason, the radiator fan would refuse to ramp up past 34%, even under manual control. To fix it, I set both fans as linked, cranked to 100%, and hit apply, then wound down to 0%, clicked auto, and hit apply. Suddenly the fan started responding normally and ramped up. Not gonna lie...this is a pretty serious issue if PX1 is causing the fans to malfunction on default settings...