Originally Posted by
Darkstride
You can download a program like MSI Afterburner that allows you to adjust clock speeds. Try lowering it by something like -100 and see if it stops the crashes. Don't go crazy changing any settings that you don't understand, but there should just be a slide bar for GPU Core Clock that you can adjust.
I've had this issue more than once over the years with XIV, and the most consistent cause of crashes (for me) was having an overclocked GPU. As soon as I change it, no more crashes.