If DevMode is not being reliable, a crude way to determine whether you are GPU limited or not is to monitor GPU load using a utility like Windows Task Manager (doesn’t seem to work with DX12 in my experience but DX11 is fine), GPU-Z or HWiNFO. If your GPU load is constantly >= 97% then you are GPU limited. Note this is not reliable if you use frame rate caps or MR, but for normal unfettered VR it is good enough.
eg. here I am mostly GPU limited flying Concorde supersonic (scenerio loading at such a fast speed is what stops it being 100% GPU limited)
