[sicijk]

Hello all and happy new year!
I have a 2009 4,1 to 5,1 Macpro with 10.13.6 which I'm planning to give a bit of life and less obsolescence with dual CPU X5690, more RAM, M2 boot and a GPU.

Coming from PT10 on 10.8.5 with nice experience, exception for 4GB RAM maximum use (16GB installed).

But now I'm experiencing lots of lag on PT 2019(.12)(.10) on even the most simple session. I mean... The visualisation cannot stay behind my mouse moves and this slows me back a lot..
Also navigating the session is quite laggy.
I dont believe it's a CPU thing...
I believe it's a GPU thing.... Am I guessing correctly?
Will I appreciate better performance? Or am I pointing completely wrong?

Thanks for you insight and shared experience