Overview
In the 1.1 version, The TAC design is intended to disallow internal temperature rises of more than 3 degrees Celsius, and provide the processor with a cooler environment to work in. Its main feature is a Chassis Air Guide that directs room temperature air directly in the path of the CPU fan and heat sink. The chassis air guide is a passive cooling system, and relies completely on internal system fans to guide the air.
Read more about this topic: Thermally Advantaged Chassis