The Surface Pro 4's heat sink shows off its impressive makeover, flaunting longer copper heat pipes and a large copper plate for added heat dissipation.

Most likely, these changes were made to address the heat-related throttling issues observed in the Surface Pro 3.

Designed with a hybrid cooling system, the Pro 4 takes advantage of both passive and active cooling.

Well, some of them do. Our unit uses a combination of passive cooling and...well, passive cooling. More powerful models include a fan that activates when temperatures get too high for passive cooling.