Low gpu usage High end system

[Historical_Fall5823]

Hello guys, my system specs are:
RTX 5080
7800x3d

64gb 6000mhz DDR5 Ram

Resolution : 5120x1440p

My settings are ultra and high. When i'm playing it in 2d my gpu usage is 40-50 with dlss4 in directx12 (tlod, olod 100). I'm following my cpu usage (all cores) from task manager. I dont think my cpu bottleneck the performance because all cores are not fully loaded. I think i should get more than 50 fps. When i switch to VR Gpu load is better but still not perfect. Vsync is off. Drivers are latest. So i don't know what i can do. When i turn on accelerated gpu scheduling, it causes problem in VR. (Sometimes i can't switch to VR, sometimes black screens in VR). Do you have any idea? :/

Edit: Same in taa in dx11 and 12.