Comments I read online indicate VR performance is boosted by having lots of v-cache (X3D CPUs) at least in regards to reducing frame rate drops. Perhaps this is applicable to VorpX. Here is some commentary on the matter:
5800x3D vs 5900x in VR
byu/Fotznbenutzernaml invirtualreality
The replies seem to heavily conflict with Ralf’s reply in this thread:
“CPU performance is also affected since for one vorpX has to do more work and also many calls to the DiretX API are doubled, which can be quite costly CPU wise. High single thread performance is what’s most important here. If it doesn’t blow your budget, I would recommend to go for a quad core i7. High single thread performance combined with the i7’s HyperThreading for 8 virtual threads is probably the best you can get for vorpX (and gaming in general).” – Ralf
So that’s what was happening. I thought it was a bug too.