IBM Intel Xeon E5620 49Y3773 User Manual

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The STS100A will be available for purchase for processors with TDP’s of 80W and lower 
and is an aluminum extrusion. This heat sink solution is intended to be used as an 
active heat sink only for pedestal chassis. 

 is a representation of the heat 

sink solution.

The STS100C and STS100A utilize a fan capable of 4-pin pulse width modulated (PWM) 
control. Use of a 4-pin PWM controlled active thermal solution helps customers meet 
acoustic targets in pedestal platforms through the baseboard’s ability to directly control 
the RPM of the processor heat sink fan. See 

 for more details on fan speed 

control. Also see 

 for more on the PWM and PECI interface along with Digital 

Thermal Sensors (DTS).