thx botros, but the PSU is ok to power 7 cards without any issues,
i finnally got my 7 cards back, it was all about the drivers !
i uninstall the last amd driver and now i got my 7 showing, im about to install an older driver and see if its stable enough.
Which drivers are you guys suggesting for rx480 4g ?
most people with modded Bios use 16 9 2
if u r on stock Bios so u better use 15 12 as its adviced in Claymore read me file
its good that u solved yr problem ,,, but if it happened again I think u shouls check wattage at wall with watt meter like kill a watt from amazon
https://www.amazon.com/P3-P4400-Electricity-Usage-Monitor/dp/B00009MDBU/ref=sr_1_1?ie=UTF8&qid=1494466147&sr=8-1&keywords=kill+a+wattand if u have euro plug u can get it from ebay