Didn't help. I didn't know upgrading PC will destroy whole game for me, disabliong shadows in graphicsmod brings a lot of fps up but it looks bad. With worse PC I could add 10 lights all with shadows, a lot of overlays etc. and fps were high. Now with better cpu it is 10-30 fps with 1 frontlight + shadows.
I have a similar set-up with a 2060 Super, and beefy RAM and CPU. I upgraded from Repack 4.0 to DX 4.01 and have the same issues now too. From 100fps average before (with all graphics mods cranked up and even in sex scenes getting at least 60fps), to 50fps in Character creator and only 20-30fps in sex scenes. (With lots of jittering)
It started AFTER I updated too. Because I ran the game getting about 120fps in character creator before realising I needed an update.
I'm still sussing out stuff, but I think we might wanna re-do the install. Get your Zip/Rar file, and unpack it again. Don't use the launchers updater, and just try and track down all the mods you need to update manually. This way, we can sus out the "bad update" and fix our FPS issues.