HDMI from Mobo, no cards in my system
there is no specific reason why I am using only the HDMI. Are you suggesting I use SPDIF (optical right?) for audio and HDMI for video? If yes, why?
Sounds a bit silly maybe... but I'm an IT guy, and I don't trust my components to handle audio over HDMI properly... and for me it's just because it's still early days for PC audio over HDMI. I worry about system lag, if audio and video are both going over HDMI and you're dealing with a 16GB Blu-ray rip... like it can get slammed.
Every case is different. I have my video card sending my video, and I let my mobo handle my audio over spdif (yeah optical.. or RCA). It's just tried and true. I know it passes through without decoding before hand... I have my FLAC Kyuss collection playing with no issues, and every rip I have - even if it's a blu-ray rip... still decodes DTS perfectly through my receiver.
It may be a bad example... and maybe I'm just junior and not at the level of Audiophile many of the members here are... but it just feels like trying to put a spoiler on a Pontiac cavalier. I fully trust HDMI on dedicated sources like Blu-ray players, PS3s, but from PC... just not yet... unless you've really stripped your operating system into a streamlined media assassin.
Mind you... the gear I'm toying with is a few years old. If I had the chance to work with some of the new $300 boards out, I might change my mind.