Nvidia 680I LT SLI - Manual (Page 28)

Mainboard nForce 680i SLI/
Mainboard nForce 680i LT SLI
24
Windows ® Vista Driver
Windows ® XP (64bit) Driver
Attention
Before you install the Realtek Audio Driver on Windows ® XP
(64bit) operating system, please go to the Microsoft ® website to
install the update for enabling HD Audio.