EVGA H55 - Manual (Page 33)

Configuring the BIOS
The Advanced Chipset Features menu also allows you to enable/disable some
onboard devices, they are as follows:
 HD Audio Controller
Use this function to set the onboard audio chip function. It is recommended
to leave this enabled, unless you are using an external sound, add-on sound
card.
 IEEE1394
This function allows you to enable or disable the IEEE1394 (Firewire)
interface.
 Intel VT-d Configuration
This option menu allows you to enable, or disable, Virtualization
Technology for Directed I/O. This setting can help improve performance
in a virtualized environment, it is recommended to leave this disabled for
standard system setups.
 Internal HDMI Audio
This function allows you to enable CPU HDMI Audio.
 LAN Controller
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.
 JMicron Storage Controller
This function allows you to enable or disable the JMB363 SATA interface.
 P80 Show CPU Temperature
When this function is enabled the onboard Post Port LED will display the
CPU temperature.