bosnianwizard: I've played the game for ~21 hours or so and I've noticed stuttering here and there and I've gotten over it but it's really getting on my nerves lately when I went into more crowded areas of the map and when there is a higher number of NPCs on screen. Even without that the FPS cuts itself like crazy, in the woods it goes from 60 to 59 and in crowded areas sometimes to 45 but not in a nice transition, but a cut that freezees my screen. Does anyone know a fix or has similar issues?
Specs:
Ryzen 2600X
Nvidia GTX 1080
8 GB 2400 RAM

Fate-is-one-edge: Your rig is perfectly capable of running the game on stable 60 fps while maxed out on a FullHD resolution.
https://www.youtube.com/watch?v=Nx1oaLcrr6Q (Hairworks on)
Before all, check the FAQ pinned on this forum.
https://www.gog.com/forum/the_witcher_3_wild_hunt/faq

If nothing works than you could pay some attention to the following.

1.As of late all owners of AMD GPUs experience lag/stuttering and graphical glitches, due to the release of the latest drivers, being unoptimized for The Witcher 3.
https://support.amd.com/en-us/download/desktop?os=Windows%2010%20-%2064

2.Unhindered compatibility of the new generation of AMD Ryzen CPUs with a Win10 OS requires a BIOS update.
https://www.pcworld.com/article/187437/software/how-to-update-your-bios.html

3.Owners of NVIDIA GPUs can refer to the release notes of the latest GPU drivers, for any issues.
http://us.download.nvidia.com/Windows/398.82/398.82-win10-win8-win7-desktop-release-notes.pdf

4.Always make sure you are using the latest GPU drivers compatible with your system.
Assuming that you are using a Windows 10 OS, be advised that any Windows updates as of late (6 months) are known to reduce gaming performance, cause input lag and stuttering or require uninstalling the GPU drivers and reinstalling them, in order to function properly.
https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware-winpc/windows-10-and-nvidia-drivers-having-to/7fd3a87e-391a-42db-86f4-595de1d017d7
Even though the above rarely happens anymore, crucial files of your GPU drivers can be deleted or corrupted by new Windows 10 updates.

Let us know if you solved your problem. Good luck.

bosnianwizard: I've played the game for ~21 hours or so and I've noticed stuttering here and there and I've gotten over it but it's really getting on my nerves lately when I went into more crowded areas of the map and when there is a higher number of NPCs on screen. Even without that the FPS cuts itself like crazy, in the woods it goes from 60 to 59 and in crowded areas sometimes to 45 but not in a nice transition, but a cut that freezees my screen. Does anyone know a fix or has similar issues?
Specs:
Ryzen 2600X
Nvidia GTX 1080
8 GB 2400 RAM

Slick_JMista: play it without GOG galaxy enabled. It works for me.

Fate-is-one-edge: When did you do all of them you monster?!!
Anyway. Always check the FAQ.
I advice you to redo the list step by step and with more care.
I would like to note on what Slick said, that The Witcher 3, installed through GOG Glaxy can be started without running GOG Galaxy prior, via the witcher3.exe.

bosnianwizard: Tried that, the same thing is present sadly.

Fate-is-one-edge: Can you run the game on compatibility mode (Windows 7) real quick for me?

bosnianwizard: Didn't help, starting to think that it's not reserved for the game, because I see it on every game I install. And it's a brand new PC.