[Issue] Video service is currently not responsive

Exactly ! I’m a geek always happy to play with new stuff, but here it’s not the time for that.
It’s gonna cost you really a lot. Plus imho, the new macpro is really interesting with 8core at least, 32gb ram and the D500 config for serious daw. Thinking of going 12-core next year…
Next year because of thunderbolt 3 coming and still not many TB 1 sound cards. No way to go for FireWire with adapters.
It’s never been a question of connection speed, but latency. And I would trust adapters on that matter…
BLACKMAGIC or Aja for video in TB is already a go, but there still is the mass storage problem…
Really huge amount I money… ;-(
Maybe another gpu for now ? Just to see if it’s better.
I would wait N6.5 though to test all N5 - 6 - 6.5 with your actual setup, then with more ram, and then with another gpu in despair…