Intel QX9775 EU80574XL088N Data Sheet

78

NOTE: Figure is not to scale and is for reference only.

The processor provides two thermal monitor features — Thermal Monitor (TM1) and 

Enhanced Thermal Monitor (TM2). The Thermal Monitor and Enhanced Thermal Monitor 

must both be enabled in BIOS for the processor to be operating within specifications. 

When both are enabled, TM2 will be activated first and TM1 will be added if TM2 is not 

effective.

The Thermal Monitor (TM1) feature helps control the processor temperature by 

activating the Thermal Control Circuit (TCC) when the processor silicon reaches its 

maximum operating temperature. The TCC reduces processor power consumption as 

needed by modulating (starting and stopping) the internal processor core clocks. The 

temperature at which Thermal Monitor activates the thermal control circuit is not user 

configurable and is not software visible. Bus traffic is snooped in the normal manner, 

and interrupt requests are latched (and serviced during the time that the clocks are on) 

while the TCC is active.