GPU usage in VR 50% - 2D 99% - Why?

[Alexified]

DCS VR ran smoothly for a while, but since today, I've noticed that only about 50% of my GPU power is being used in VR. When I fly in 2D, I have a utilization of 99%. I also tried the same settings in VR as in 2D, but even then, I have a different GPU utilization.
I have absolutely no idea how this could have suddenly changed. My latency in VD is sometimes at 37, then it goes back up to 59, and my game latency increases from 1 to 12ms.
I've implemented all the tuning and optimization tips on my PC (Core Parking, Game Mode off, HAGS, etc.).

Thanks for your help.

i9-13900K - 4090 - 64GB RAM - VD - Meta Quest 3 on 6GHz dedicated TP-Link BE550 - Latest DLSS Preset K

Edited Sunday at 07:29 PM by Alexified

[SharpeXB]

My guess would be that VR is more demanding on the CPU since it’s drawing dual images. So that bottleneck means the GPU isn’t being utilized fully.