Answer

"BIOS_SW1" is the multi-BIOS switch which got two built in BIOS "BIOS-A" and "BIOS-B". When BIOS-A failed to boot up, you can switch to BIOS-B and boot up your system.

Models

  • X299 TOMAHAWK AC
  • X299 TOMAHAWK ARCTIC
  • X370 XPOWER GAMING TITANIUM
  • X299 RAIDER
  • X299 TOMAHAWK
  • X299 XPOWER GAMING AC
  • Z270 XPOWER GAMING TITANIUM
  • X299 SLI PLUS
  • Z170A XPOWER GAMING TITANIUM EDITION
  • X299 GAMING PRO CARBON AC
  • X299 GAMING PRO CARBON
  • X299 GAMING M7 ACK