M4700 and K2100 - audio problem

Hi,

Recently I have swapped my K1000m to K2100m in my Dell M4700.

Installed latest Nvidia drivers ( 361.91 ) and everything seems to work except audio. In device management under audio there is no Nvidia audio. Have there only IDT HD Audio.

Probably thats why I have no option to select HDMI to pass audio there. On previous K1000m it was OK.

When installing Nvidia drivers there is no option to select Nvidia audio.

When trying to install GPU drivers drom dell site ( http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=GKPWX&fileId=3480937038&osCode=W764&productCode=precision-m4700&languageCode=en&categoryId=VI ) I have error stating that no appropriate hardware was found.

As far as I know this K2100m was taken out from M4800. Is there any way to install this Quadro audio and be able to pass audio via HDMI?