so neither rx580 is suitable for new miners period...if u r just starting now it is WAY TOO late...u r better off spending on RTX30series. Best card that can be bought...lowest power usage and requires only an 8 pin. No problems with mine whatsoever....as usual.
RTX cards are still selling for higher price today it's not a good option for a newbie, ROI is way longer than those rx580 and 1660 super which are the lowest GPU for mining today, rx6600xt is another good choice.