Of all the myriad ways to cool a PC perhaps none is more elegant than the all in one liquid cooler. The AiO traces it's lineage back to the elite world of PC water cooling where money and time are thrown haphazardly at a project in an attempt to perfect this science and art. Each of these self contained units are an elegant, fully sealed solution using the thermal properties of water to draw heat away from the processor. But of course like all things, not all AiOs are created equal and the past year of 2015 has been no exception. And so as this year draws to a close and we begin to plan excitedly for 2016, join us as we pick out the very Best AiO Coolers of 2015 reviewed here at ThinkComputers.org.