Basically, after shutting my PC down one night, the next time I started playing FF14, it started running into an issue where my FPS suddenly drops from its once consistent 60 FPS to as low as 10 FPS, and continues to stay this way for varying amounts of time. I've been using a Nividia GTX 1060 for over six months with no major issues.

From monitoring the GPU, it seems to be hitting 100% usage during the laggy periods, when it normally would top off at around 80% when it's running at 60 FPS. The temperatures are within safe ranges, too, and no other programs are running that could be placing a load on the GPU.

I'm really at a loss as to what could be making this happen.