To add to this, I am seeing this issue repeatedly in the last few weeks.

My PC:
Intel Core i5-4690k
AMD Radeon R9380, software version 17.5.2
8GB memory
Using dx11 mode in ffxiv
Windows 10

Now I did turn of Game Mode, and that seems to have stopped the crashes from occurring every few minutes to maybe once an hour. This really needs to be fixed.