Intel IB868 - Manual (Page 52)

DRIVERS INSTALLATION
48 IB868 User’s Manual
AC97 Codec Audio Driver Installation
Follow the steps below to install the Realtek AC97 Codec Audio Drivers.
1. Insert the CD that comes with the motherboard. Click Intel Chipsets
and then Intel(R) 915GMChipset Drivers.
2. Click Realtek AC'97 Codec Audio Driver.
3. Click Finish to restart the computer and for changes to take effect. .