I just tried with my main rig (Ryzen 1700 + GTX 2070), updated to the latest NV drivers.
With CUVID video decoder selected I can see this behavior only for 4K/HDR with "HDR color recovery" in SVP turned on - it can't go above ~80 fps for some reason. In all other cases 120 fps works w/o issue.
As this case could be interesting for more users, we could try remote via Teamviewer (ver. 12 please!) at the same time you wrote previous post (near 1 pm GMT).
Send a email with credentials to support@svp-team.com when/if you will be ready ![]()