EVGA Classified SR-2 - Manual (Page 59)

EVGA Classified SR-2 Motherboard
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 HD Audio
Use this function to set the onboard audio function. It is recommended to
leave this enabled, unless you are using a different audio solution.
 Marvell LAN 1
This function allows you to enable or disable the onboard primary network
controller. It is recommended to leave this enabled, unless you are using an
external Network Controller, such as an EVGA Killer Xeno card.
 Marvell LAN 2
This function allows you to enable or disable the onboard secondary network
controller. It is recommended to leave this enabled, unless you are using an
external Network Controller, such as an EVGA Killer Xeno card.
 P80 Show CPU0 Temperature
When this function is enabled the onboard Post Port LED will display the
CPU0 (primary) temperature.