I have Gigabyte motherboard EP45-UD3P with details as following: Supports Dolby Home Theater® audio to create a stunning surround sound listening experience. Blu-ray playback outputs supported by high quality 106dB SNR ALC889A HD audio Realtek ALC889A codec High Definition Audio 2/4/5.1/7.1-channel Support for Dolby Home Theater Support for S/PDIF In/Out Support for CD In I also have Gigabyte graphic card ATI 4850 which claims that it provides HDMI with 7.1 digital surround audio. I recently purchased a DVI-HDMI cable to connect my graphic card to the receiver without knowing that going down this track, my new cable wouldn't transmit audio signal and I have to use optical cable to get sound from my motherboard which is fine as I already have an optical cable. I just know that if I use HDMI cable + DVI-HDMI adaptor that comes with my graphich card to connect my graphic card to the receiver, it will disable audio on motherboard which is fine as it also transmit audio signal from graphic card within one cable. So... which is the better option? 1) Audio from motherboard + DVI-HDMI cable + optical cable 2) Audio from graphic card + DVI-HDMI adapter + HDMI cable Thanks!