Cooling and quietness go hand in hand. The M2 runs fast but stays cool and quiet because it employs some of the best technology on the market. If you wonder why you should never block the vents on the M2 the below explanation provides the rationale.

THE HEAT PIPE

The heat-pipe is employed to keep the 3.2 GHz Desktop processor, the graphics circuits and the RAM cool. Here is how it works on the CPU. One end of the heat-pipe sits directly on top of the CPU socket. As the CPU heats up the heat-pipe, made of highly conductive copper, heats up too. The heat-pipe extends 6 inches beyond the CPU socket and fans are placed on the bottom of the M2 to funnel cool air from the outside and pass it over the heat-pipe to keep that end cool. The hot air is then dumped out the back of the machine through the air vents. As one side of the heat-pipe cools the heat 'travels' into it via passive convection. This allows heat from the CPU to dissipate quietly. The alternative is to place a big, noise fan directly on the CPU. Instead the M2 employs smaller, quieter fans that result in much quieter operation.

There is a similar heat-pipe in the M2 that targets the video circuit. There is also a small temperature-sensitive fan which targets the RAM. The M2 is well engineered to run ultra fast but always stay super cool.