HDMI 1 video is processed by the Qdeo chip. If you send a separate video source via HDMI 2, it's processed by the SOC. Optimum is video into HDMI 1 and audio into HDMI 2. There are a boatload of posts and detailed info on AVS Forum: http://www.avsforum.com/t/1428214/official-oppo-bdp-103-bdp-105-anticipation-thread
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