GIGABYTE GA-8I865PE775-G-RH - Manual (Page 67)

Appendix - 67 -
English
STEP 5:
On the AC97 Audio Configuration menu, click the
Speaker Configuration tab and select the 6
channel mode for 5.1 speaker output check
box.
Select the Only SURROUND-KIT check box and
press OK.
When the Environment setting is None, the sound
would be performed as stereo mode (2-channel
output). Please select the other settings for 6
channels output.
Basic & Advanced 6 Channel Analog Audio Output Mode Notes:
STEP 4:
After installing the audio driver, you'll find a Sound
Effect icon on the lower right hand taskbar.
Click the icon to select the function.