I have cooler master 500w PSU and bought Asus Dual Rx 580 8gb. My supply has only single 6 pin pcie connecter. while GPU supports 8 pin connector. I am very confused some are saying buy new PSU and some are saying buy 6pin female to 8pin male connector and it will work. I know that 500w is enough for rx 580 but just want confirmation if some has previously used this method. it is safe or not. your suggestion will be highly appreciated.