well the card i bought was rated to do 565/565 stable however i cannot produce the same results as the person i bought i off of. also when i let atitool run to long trying to find max mem/core and generally crashes my computer or artifacts really bad after it reaches a certain point. even after it backs of when it detects some artifacts it can keep doing it but a reboot fixes it no problem. now im thinking it's either atitool itself causing all the problems or the temperature atitool brings it too when scanning which can reach around 75c.