Raytracing for Ledwall ndisplay FPS drop

Hi, recently i’ve come across an issue with the raytrace in my ledwall project. I light my scene full dynamic for flexibility and everything work fine in editor but when i launch my scene with the ndisplay launcher the same scene have an extremly low framerate. This happen just when raytracing is on.

I use it for reflection and GI, GI is set to final gather. it look a little noisy in editor but when i’m in launch with the fps drop it seems to have different parametter. maybe it’s not that at all but i was wandering if a launch in ndisplay force a certain quality to GI in raytrace. if it’s not that, i didnt have any clue.

I’m working on a RTX 3090 / 128G ram / AMD Ryzen Threadripper 3970X 32-Core Processor 3.69 GHz so i’m surprised to have this problem, even if i know brute force GI can make my fps drop easely.
I link a screenshot of my postprocess,