Same here, setup:
Ryzen 5600x
32gb 3600mhz
RTX 3070 8GB
In small areas with few people I have 90+ frames. But in places like the portal to Temple of eluvium it doesn't exceed 30 frames. I was even doing a twitch live and I shot it down. Something to note is that then I closed the stream and returned to the game in that same place and the use of GPU was at 100%, 100% of an RTX3070 and throwing ONLY 30 fps. It's crazy-
I will try to reinstall the drivers and tell you how it goes.