Somehow, billions of computer clocks stay in sync with one another across the planet all day without a Quadro card. I agree with what you're saying, but disagree that it's the only way.
Really? I have 8 streams out of Resolume on a 2013 Mac Pro to 8 Apple TVs with the special app I am referring to that stayed in-sync for five days, before I stopped trying to get it to disappoint me. There was the occasional, and I do mean occasional, 1-frame deviation every now and then, on 1 of the 8 streams. And, this is what I hope IP-based genlock to resolve. But, candidly, happy to help you with your networking issues! ! !
What was the issue then?