Update

Perhaps predictably, Dell has denied that there is an issue with the fans in some XPS 15 9570 laptops turning on whenever the NVIDIA GPU is activated. A representative remarked that:



...it is normal for the fan to run even before reaching the temperature threshold. This has been verified by our product engineering team. This should not affect the functionality of the computer. The system behavior is as per the BIOS instructions.



The same representative then clarified that:



I believe that there are no hardware issues related to the GPU or the fan. I have verified this with our product engineering team, and it is working as designed.

Dell has not stated at what temperature threshold the fans should switch on, but it is disappointing to note that Dell is happy with the fans "to run even before reaching the temperature threshold". However, multiple people on the XPS 15 9570 Owners Thread on NotebookReview have remarked that the fans now turn on whenever the NVIDIA GPU is activated and not when the system reaches a certain temperature.

We are still pressing Dell for answers on this issue and are awaiting an update on the coil whine problem too. We will update this article when we receive a response. Please let us know of your experiences with BIOS 1.7 and whether you have encountered any other problems that we have not mentioned.