Sad to hear.Yes, the same issue. I posted earlier in the thread as my GTX 1080 (which I have now gone back to, I refunded the 2080Ti) had stuttering issues particularly in the Witcher 3.
The standby memory stutter bug (Microsoft claimed to fix a related bug, but it's not fixed) seems to only affect Nvidia, I have not seen a single AMD GPU user with this issue, yet Nvidia claim it's simply a Microsoft problem. If that were the case then AMD would also be affected.
By the way, I found something interesting: 3D Mark Firestrike graphics test 1 will stutter at the beginning of the test unless Nvidia Share is enabled in Geforce Experience. When you enable this all stuttering goes in this benchmark(it doesn't work for games unfortunately). I have confirmed this on 3 Intel+Nvidia+Windows 10 PCs. The only one without the problem was an AMD Ryzen 1600 + 1080 Ti which also doesn't stutter in the Witcher 3.
My solution will be to go AMD when they have something competitive if this is not fixed.
1. Is your TW3 stuttering issue absolutely the same on RTX 2080 Ti as the stuttering on 1080 Ti? Or are there any key differences/improvements with 2080 Ti?
2. What about PUBG? Some improvements with 2080 Ti?
3. Did you try Intelligent standby list cleaner (ISLC)
I saw a bunch of people swearing that ISLC fixed all the stuttering. I don't know is that a truth but will try later.
4. Did you try new Win10 1809 build? Any advantages over older 1803?
5. What about Win10 LTSB 1607 or LTSC 1809?
Thank you for the info!