Microsoft MOTHERBOARD USER'S GUIDE PXP43 - Manual (Page 45)

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Software Setup
Chapter 4: Software Setup
For Windows XP (64bir) Driver
For Windows XP 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.
Intel Chipset INF – It provides all drivers for the functions which built in both the
Northbridge/ Southbridge.