1.) I'm unfamiliar with firestorm, but I would reccomend unistalling it and installing MSI afterburner (even if you have a zotac card it will work fine) then make and automatic fan profile and see if your fan speed is increasing as the GPU gets hotter, if not something is wrong with your card.
2.) Use driver sweeper and then reinstall your driver (or go get the new one from the nvidia site) just to be sure, but that's a general error message that the card has recovered from an error or crash, it doesn't neccesarily mean you have a driver problem.
Also make sure you have enough of a PSU for that card, underpowering the card could be causing it to fail.