Sorry but I don't agree.
I had a similar situation where I had a Gigabyte graphics card. They had 2 year old graphic card drivers on Gigabyte's website, where I had problems with games that did not work.
And then I was told by AMD support, to download the latest drivers from their official website where it was a completely new driver that works for all AMD graphics card manufacturers. Manufacturers seem to stop caring about drivers after the product is 2-3 years old.
But back to the thread.
None of the Realtek drivers work. Both from Acer's website and Realtek's website. I think I don't really need them as the sound is played by Nvidia driver. I have now uninstalled the Nvidia driver and reinstalled it. I will now test it and see if it works.
I also download the latest chipset drivers, no problems so far with it.