well my Nvidia 430 came today.
Installed it, and got HD sound from both HDMI port and DVI (with regular HDMI adapter) ports.
It still won't pass through to the 1.3 AVR in 3d,but wasn't surprised at that. but can choose either cable to go direct, and works fine.
Wish I'd bought the nvidia in first place, so much less of a headache.....was on that damn 6450 for around 20+ hours and getting nowhere fast messing with drivers.
Only a couple of issues I have, though probably straight forward to sort
1) AVR is out of sync with video, by a few hundred ms. Should be able to set that properly in the AVR when I get chance to play on it.
2) I had to press the "Enable 3D Vision" for powerdvd11 to play the movies/detect 3D. It then causes PDVD to switch to 1080p24 and 3d mode. No problem there as such. The problem is when try to play any other non 3d movie, bluray,divx,mkv, etc with settings of XBMC set to match the framerate to the movie (ie 24hz in most cases), this causes the screen to switch to 3d mode too for every movie.
Any ideas how I go about stopping that from happening so normal movies play fine in 24p and auto switches for only 3d ones?