Thank you for the reply.
I believe this monitor is 8 bit plus FRC...not true 10bit, so, maybe that "frees up" the hardware a bit to support it at 120hz.
I'm off the phone again with Apple Support and they just can't tell me anything. All the articles talk about how many 4K and 5K monitors they can support on a Mac Pro with the Radio Pro Vega II MPX Module....all at 60hz.
But they just can't tell me anything about how it would support a 5k2K monitor at 102hz...heck they can't tell me how it would work at 60hz....I asked if they had any way of escalating this to maybe to higher tier support, maybe hit up the lab guys to ask, but nothing like that offered.
So, I dunno. I'm thinking I might pull the trigger, I need a nice monitor and I'm guessing at the very least it would work at 60hz, which my old monitor was....I"m not gaming here, but with multiple screens opened up on such a wide monitor, I'm guessing that moving the mouse and windows around would benefit from higher refresh rate and look nicer without blurring....
serrano