I too had similar prblem and my chipset driver was also old, so I google few driver optimizing applications like Driver Detective, Driver Agent or Advanced Driver Optimizer dey will get you the latest updates 4 ur. The issue now seems to be that there are no available drivers for Windows 7 for this sound card at least none that I can find. This page contains the list of device drivers for Asus All Series. English for academic purposes r jordan in pdf. To download the proper driver, first choose your operating system, then find your device name and click the download button.

Asus windows 7 drivers download
February 16, 2011
PCI_Xense_7_12_8_1793_W7.rar
10.8 MB
2,836
Audio and Multimedia
Windows 7
What's New:
1. Fix: Pop sound issue when play system test sound with DTS interactive enabled.
2. Fix: When open Xonar AP and Xonar ASIO at same time, moving Xonar AP will cut the Xonar ASIO window.
Supported OS:
Windows 7 32-bit
Windows 7 64-bit
Here's other similar drivers that are different versions or releases for different operating systems: Asus windows 7 drivers download
    • February 16, 2011
    • Windows XP
    • 1,648 downloads
    • 19.3 MB
    • February 16, 2011
    • Windows Vista
    • 916 downloads
    • 13.2 MB
    • February 16, 2011
    • Windows 7
    • 2,878 downloads
    • 13.3 MB
    • February 16, 2011
    • Windows XP
    • 1,671 downloads
    • 13.6 MB
    • February 16, 2011
    • Windows Vista
    • 1,037 downloads
    • 10.6 MB
    • November 8, 2010
    • Windows Vista
    • 856 downloads
    • 12.1 MB
    • November 8, 2010
    • Windows 7
    • 1,757 downloads
    • 12.1 MB
    • November 8, 2010
    • Windows XP
    • 1,926 downloads
    • 16.4 MB
    • October 15, 2010
    • Windows 7
    • 8,978 downloads
    • 11.9 MB
    • October 18, 2010
    • Windows Vista
    • 1,097 downloads
    • 11.9 MB

March 21, 2011
Audio_Realtek_Win7_64_Z6016301.zip
83.6 MB
118,498
Audio and Multimedia
Windows 7 64-bit

Arduino serial xon. Asus Realtek Audio Driver v 6.0.1.6301 for Windows 7 64-bit

Here's other similar drivers that are different versions or releases for different operating systems:
    • January 7, 2016
    • Windows 8
    • 5,410 downloads
    • 5.8 MB
    • September 27, 2013
    • Windows 8
    • 8,886 downloads
    • 6.4 MB
    • October 29, 2013
    • Windows XP/Vista/7
    • 2,727 downloads
    • 140.7 MB
    • October 29, 2013
    • Windows 8
    • 2,171 downloads
    • 293.0 MB
    • April 15, 2013
    • Windows 8 64-bit
    • 2,784 downloads
    • 113.4 MB
    • August 11, 2009
    • Windows XP
    • 143,822 downloads
    • 31.1 MB
    • September 16, 2011
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    • 64,861 downloads
    • 5.5 MB
    • December 29, 2010
    • Windows XP/Vista/7
    • 18,186 downloads
    • 18.5 MB
    • December 29, 2010
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    • 32,114 downloads
    • 117.8 MB
    • March 21, 2011
    • Windows 7
    • 482,081 downloads
    • 5.4 MB