Happened to me as well. I had an m14x that was going just great, and all of a sudden an inexplicable frame rate drop in only this game. I tend to not update drivers unless something is broken, so it wasn't a driver change, and my temps were the same as they ever were - just around 70c ish. Nvidia 555m. I ended up getting rid of the notebook in favor of a more powerful y510p with 755 sli (that shreds the game, btw, though it could be just muscling through whatever was bad before), but it was definitely something weird that changed within XIV. If it happens to this machine I will likely take more time to research it more.