Mine is SuperJetstream with Samsung memory. They already have bios with increased TDP so they can OC better. Plus in palit thunderstorm utility you can raise gddr memory voltage to achieve better memory OC.
actually the 480 does that at a max of 150 watts, 180 watts is just too much for my PSU's
Actually i didn't do correct wattage measurements from the wall. I rely to nvidia software readings ... So I guess it is 170-180watt.
I know that bios mod for rx480 can push it to 32mhs eth but only in single mode and no less then 180watt with crazy temps.