It's new, i thought of that too but the fact is it only happens while in FFXIV, i've played BF4's beta and no problems at all, I think is something in the game's graphic prefrences that it's not working right...

(i've reinstalled the graphic drivers and stuff and same sh*t)

PD: First time I've played 4 hours straight and no problem, then I "touched" the graphic preferences of the game, maybe was that, don't know, I'll update as soon as I have some answer..