Are you using MSI Afterburner to limit the FPS?
Is each game definitely running in Exclusive Fullscreen mode? Because FreeSync does not work in Windowed or Borderless mode.
You can configure the correct refresh rate, 144HZ via the Windows Display Properties, like in the picture below.
Please make sure that you read the How To Enable FreeSync document.
If that is your real name. You sir, are a legend. Go back to your hometown and tell your people of the great victory that was won over technical difficulties today.
The issue was the advanced display settings. I assume for most, this changes automatically upon introducing a new display to the system. But not for me on this occasion. Perhaps something to do with the fact that I had upgraded to windows 10, before the monitor. Where as everyone I have asked have upgraded the monitor, before the OS.
Just a theory.
Thank you for the kind words David. Any further problems, you know where we are.