Then comes the temptation to show it off via HDMI - and if mrspeedmaster (I believe I'm attributing correctly here) is indeed correct about the HDMI semiconductors being based on a 65 nm process, then it will indeed consume power quickly and more importantly heat up piping that lovely data out.
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Still might not help the potential for the HDMI heating issue, tho. Might make it worse. (temptation to record and play longer movies because of the quality)
I haven't seen any fab information for the HDMI processors, but my personal testing with the HDMI out reveals that heat is not an issue.
I've sideloaded several H.264 movies with bit rates of roughly 5.5 Mbps -- a quality sufficient with H.264 to provide solid detail at a 720p resolution. Significant playback (20+ minutes) with these movies reveals no noticeable heat gain.
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