Quote: Originally Posted by RudeDawg
Is the first one connected to my video card (ATI Radeon 5750 1 Gb)?And do I need to uninstall the High Definition Audi Device to update the driver?
Yes it is, and no you don't. ATI cards have (since HD 2xxx series) all have a built-in Realtek audio chip on the for using audio over HDMI, and the driver for it gets installed when you install the ATI driver, and will also work with the actual Realtek drivers. One thing the actual Realtek driver will do is to allow you to configure (albeit limited) it like the Realtek onboard audio.
The High Def Audio Device will be your onboard audio without the proper drivers, which if you want to use the onboard audio needs the Realtek driver. It will work enough in that you will get sound using the default HD driver, but it will be limited and have very limited control options.