Hi, so i have seen gigabyte rx 570 and rx 580 they look the same, even the size.. even my brothers rx 580 and my rx 570 make the same fan speed..also on youtube 95% of them tell to oc both rx 570 and rx 580at 1400 mhz which is a sweet spot..so i can say that both have the same cooling mechanism and rx 580 is just a oc version of rx 570?