A plurality of channels coupling at least one computing device to one or more devices are ranked. The ranking of a channel of the plurality of channels is based on one or more criteria including a size of a path group used to couple the channel to a device of the one or more devices. Based on the ranking, a selected channel of the plurality of channels is selected for which utilization state of the selected channel is to be changed. The utilization state of the selected channel is changed, in runtime, to reduce overall power consumption by the plurality of channels.