MSI X99A GAMING 7 Manual page 46

AUD_SW1: Audio Power Switch
This switch specifies the power mode for back panel audio ports.
Important
• Before switching to "Direct Power mode", please make sure the "Direct Audio
Power Connector" (AUDPWR1) has been connected to the power supply.
• Do not use the audio power switch while the system is on because it will damage
the motherboard.
Direct Power
mode
En-32
Onboard Power
mode (Default)