I use Oculus Rift on a GTX 1060 3GB. I also use the Oculus Homeless patch, which replaces Oculus Home with a plain grey interface. The other day I noticed stuttering and saw that Oculus had updated, overwriting Homeless. Once I reinstalled the patch everything was back to normal. I've had similar issues when M$ "updated" my Nvidia driver. Some claim that Homeless is obsolete. That's not true

I can highly recommend it if you have problems with FPS and stuttering:
Link
EDIT: A few more:
If you have Nvidia Experience installed, and you don't need it badly, uninstall it using Windows Settings. A standalone updated driver works fine.
Some web pages Like Elite Fandom Wiki clutters the FPS.
If everything is running smoothly, entering the Galaxy Map while in a nebula etc. can cause stuttering. In that case I open System Map for a few seconds and look around until the stuttering disappears.
HOTAS software, like the one for X52 can also mess up. Again consider only using a driver.
Basically free as many resources as possible. Close unused software, and uninstall software you don't use.