First properly identify your laptop using dxdiag.exe and confirm your System Model and BIOS number.
I used this Realtek audio driver in my G752VSK to great success:
Version 6.0.1.8443 2018/08/24 178.02 MBytes found on the ASUS G703GS support page:
https://www.asus.com/supportonly/G703GS/HelpDesk_Download/You will need to delete your existing audio driver manually (Program Files x86/Realtek) Simply delete the whole folder with contents. Then install the new driver. The process will require a couple reboots but the installation is complete.
After installation, check Control Panel/ Programs and Features/Realtek High Definition Audio Driver, confirm installation of version 6.0.1.8443.
G752VSK, G75VW-3D, G51J, G1S
Homebuilt Windows Server