Skyrim Special Edition has no option to disable Vsync.
Skyrim Special Edition has no option to disable Vsync.
might be a driver issue where the settings aren't taking effect or something in the register stays the same. If INI doesn't respond, the driver should force it, but if the driver itself isn't reacting, you might need to reset everything, reinstall, and try disabling force synchronization again. For NVIDIA, using the NVIDIA Inspector is straightforward—it will apply the changes regardless of what. On AMD, it's unclear if they have a similar tool; you may need to check their documentation or support options.
Yes, you might need to remove your current GPU driver and set up fresh ones for optimal performance.
The only sound mod present in your Skyrim folder is the one you found, and I encountered an issue after reinstalling the game. You may want to search for those specific sound mod files again.