BTW 1: As you seem to be looking for videoconferencing and more you may be better off avoiding ARM based servers (for now), because some of the prospective software packages that may be of interest to you need more resources or just don’t run on it (yet). (For example, video sharing and recoding or some of the Free web-files "cloud" solutions?)
Some passively cooled systems based on the J4105 or J5005 CPU may be an alternative (idle power consumption also way below 5W).
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