Hi there.
I didn't find any specific fix. However I have noticed it less and less as XP11 has gone through the early updates. I still have the stutter a little, but it does seem much more smooth than what I remembered.
Sorry I can't give you any possible solutions if you are experiencing the same. Make sure (if you haven't done so already) that you do the tweaks in nvidia control panel (like threaded optimisation -> off, power management mode -> prefer max performance, etc) as they seemed to help a bit.
Thanks
knlamb