Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

This only started happening with your new PC correct? I'm assuming you don't have this problem with other games? How often are these other crashes and do they behave the same way?

It does sounds like an issue with your graphics card but I'm not sure we should pin the blame on that yet.

Make sure you do not have any programs/overlays on in the background while you are playing, even if it doesn't look like it's interfering.

Check to see if there is an overheating issue (if you have the ability to monitor the system temperature).

You can also try reinstalling the graphics card drivers if you have not done so already.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!