Extreme frame drops and lag?

Hey there all.
I am getting very bad frame drop on my PC while playing in any rift or grift.
it will drop from 260+ down to 1-10 and back up and down and up and down.

Every other game in the world plays fine up to 400+fps

Any ideas?

System stats
RTX 3090
128gb Dom plat 3400
amd 5950x

I had to unmark this as a solution.
As it seems to help a bit. i am still getting the same issues.