Onboard audio not working

I recently got a new built:
Asus prime a320m-k motherboard,
Ryzen 3 1200,
GeForce Gtx 1660

Problem is that the audio is not working. I have installed the realtex drivers from the official motherboard site and also from the
Realtex official site, but no use. The realtex drivers are not showing in device manager after installation. Under playback device only my monitor is displayed and not the speakers. Since I'm using my old monitor it does not support hdmi so I'm using a HDMI to VGA converter. I want to use my onboard audio but I'm guessing the nvidia audio is disabling my onboard audio. How can I solve this??

Also, I didn’t install any nvidia audio drivers!! I have check my bios for integrated audio and speakers but there is not such option
 
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