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

I apologize for the delay in our response. You mentioned that you purchased other components for your computer, was this system report before or after those inclusions?

Do you notice any pattern to the crashes? You mentioned it can happen randomly, but does it happen more in specific areas or while doing certain actions?

You've gone through a lot of the troubleshooting that we usually offer. Unfortunately, it's a bit difficult to narrow done where the issue stem from sometimes. You mentioned you tried using two different PCs (and several different PC parts). Are there any similarities between the different builds you've had?

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