I've noticed that TM uses a lot of VRAM just to run complex scenes outside of VR. I'm working on an interior retail model with a lot of HQ textures and lighting. It uses over 7GB of my 3070 8GB. Right away I realized VR wouldn't be possible given the Quest 2 takes anywhere from 2-4GB+ (depending on the resolution settings of the headset) alone when connected to Quest Link.
Makes me think you would need a minimum of 12GB to run properly. Which is what TM recommends when using VR and you have a dual 12GB card setup correct? Does TM support dual card setups? I've been looking but haven't seen an official answer on that (but a handful of people have asked)
I have a 3090Ti 24GB that should be at the office by Tuesday and can't wait to see if VR will work at max resolution.