I have built my son a Dell T5600 with an Intel Xeon processor (8 physical/16 logical cores), with 32GB RAM and a Radeon RX480 GPU (8GB). Windows 10x64 installed.
For Christmas I brought him Xplane 11 and installed the whole app - all CD's.
However the graphics are awful, just moving around the cockpit is jerky and it's almost unusable.
MS flight simulator works brilliantly but doesn't give the same level of details and realism as XP11.
What am I doing wrong?