Table 2. Qualitative comparison for different future CPU cooling technologies
Table 2 presents a comparison of different technologies proposed and the key concerns associated with it. It can be seen that most of the promising technologies are using some active (rotating device) thus the bearing reliability may be the most significant challenge for all of these technologies. In addition,
refrigeration does not work at all orientations which makes it not applicable for all market segments (i.e. mobility). The designer has the challenge of integration of the proposed concepts and to make the necessary cost tradeoffs using Figure
18 and Table 1.