I don't think a driver can affect the boost table on the card. I could be wrong, but to make the changes it would have to be a firmware update, no? Boost 3.0 was implements back with the 1000 series cards, and perhaps they just need to tweak it for the new architecture.
Grain of salt, but this guy states it did;
Windows has frameworks for updating firmware on a device. So it would be possible to initiate that via a driver update. It really depends on how they implemented it. If its in the BIOS then likely not, if its elsewhere then in theory they could update.
Certainly possible some registers only NVidia knows about can control this as well. It would be useful for testing/binning to have it software based and not be required to constantly flash.
If a company updated a bios without telling me, it would be the last time I ever bought from them. Are they gonna remove the 'lol you bricked it you dummy' RMA clause if so?
I dont even let windows auto-update software ffs.