Microstutters Since Patch 1.1.1.0

As you can see, from the FPS graph, non-stop lows of sub-20 even though my max FPS is technically 190+. CPU and GPU usage are fine as well. No idea what the cause is.

System Specs:

9950X3D
RTX 4090FE
96GB (2x48GB DDR5-6000)
Samsung 970 Evo 2TB (games only drive)
Windows 11