Answer

No, it is not neccessary to plug into both socket but it is recommended when you plan to overclock the system. 

Models

  • MAG Z390M MORTAR
  • MEG Z390 ACE
  • MEG Z390 GODLIKE
  • Z390-A PRO
  • MPG Z390M GAMING EDGE AC
  • MPG Z390 GAMING PLUS
  • MAG Z390 TOMAHAWK
  • MPG Z390 GAMING EDGE AC
  • MPG Z390 GAMING PRO CARBON
  • MPG Z390 GAMING PRO CARBON AC
  • MPG Z390I GAMING EDGE AC