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So I'm running the ATI 4870x2 and from this with a DVI to HDMI adapter I have audio and video going to my tv - which feeds through to my amp and speakers. This is wonderful and I couldn't be happier, but obviously I want more.

I have a great Harnon speaker system and a 50 foot RCA cable, but when I plug in the RCA cable to the sound card it cuts out the video card.

I've messed around a bit but can't seem to figure out how to get audio from both the video and sound cards.

Thanks in advance.

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What do you mean by "cuts out the video card"? Audio? Video? Both? Also, could you provide the model of the sound card? – Chris Stauffer Dec 21 '12 at 18:45

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