4 - Support for HDMI including GPU accelerated Blu-ray 3D support (Blu-ray 3D playback requires the purchase of a compatible software player from CyberLink, ArcSoft, Corel, or Sonic), x.v.Color, HDMI Deep Color, and 7.1 digital surround sound will be added in a Release 260 driver.
so i guess it does... how good it will be well thats debatable.
I have a GTX660 and the sound on it is terrible. Whenever you have your web browser and a game open at once, the sound will just quit all together and you have to restart the programs! Motherboard sound is much better but still nothing compared to something like an ASUS Xonar.