Run Prime95 and Furmark which will stress test your ram , cpu & gpu. I've got an XFX card and found that it's faulty , even after the RMA and a new card they sent out it's also faulty. The capacitor on it's blown. So I would recommend you run a intense game and listen out for any high pitch noise coming off your card. It shouldn't make any noise so hold your gpu fan and listen if it makes a noise return it !