Mantra Displacement huge memory consumption

[derjcmp 25]

hey people! Im having a terrible problem here.

Im doing a guided ocean sim, problem is im doing a 0.004 particle separation and meshing. My final mesh is around 4 mil polys and The moment I try to render it with a simple 2k spectrum I get over 50gb in ram usage.

Is there a way to reduce the ammount of polies at render time for displacement? I tried the dicing quality and flateness but nothing seems to work

I can't even render with with a principled shader and a small scale disp noise. Same problem 

The camera is a close up, but I get the same problem even with the mesh on 10% of the screen

Im using a 64gb setup

Edited August 21, 2020 by derjcmp
missed stuff