Tomcat i7230A S5160 
                                                                  Chapter 3: BIOS Setup 
Thermal Management 2 
Thermal Management throttles the processor back as it reaches its maximum operating 
temperature. Throttling reduces the number of processing cycles, thereby diminishing the heat 
dissipation of the CPU. This cools the unit. Once the CPU has reached a safe operating 
temperature, thermal throttling is automatically disabled, and normal full speed processing 
begins again. 
The BIOS supports two types of thermal management. 
  
Thermal Monitor 1: Thermal Monitor 1 uses a highly accurate on die 
temperature sensing circuit in the CPU that has the ability to act quickly 
upon any thermal issues (~50ns). This circuitry keeps an eye on the most 
taxed areas of the CPU die at all times and will quickly act upon 
temperatures going over the safety limits. The thermal monitor's control 
circuit, when active, lowers the CPU temperature by throttling the internal 
CPU clock speed. This is done with a 50% duty cycle, which means that a 
2GHz CPU will then effectively run at a 1GHz clock speed. Due to the fast 
response time of the thermal monitor circuit (~50ns) the CPU will only be 
`throttled' for a very brief period. Once the CPU die temperature is within 
safe operating limits again it'll set back to the 2GHz clock speed it 
originally operated at. 
  
Thermal Monitor 2: Thermal Monitor 2 decreases or increases the CPU 
clock and core voltage according to the CPU load. This information is read 
from the five VID pins of the CPU. Accordingly, the CPU temperature is 
also automatically decreased, when the core voltage is decreased. This 
improves the CPU lifespan. The states switch is so fast that the 
performance decrease is insignificant. 
Disabled / Enabled 
Set Max Ext CPUID=3 
Sets Max CPUID extended function value to 3. 
Disabled / Enabled 
C1 Enhanced Mode 
This feature is used to enable the C1 Enhanced mode. 
Disabled / Enabled 
VT Feature 
This feature is used to enable the VT feature. 
Disabled / Enabled 
No Execute Mode Mem Protection 
This feature is used to enable the function of No Execute Mode Mem Protection. 
Enabled / Disabled 
Frequency Ratio 
This feature is used to set the Frequency Ratio 
X 8 / 19 /14 /15 / 16 / 17 / 18 
Processor Power Management 
This feature is used to set the Processor Power Management. 
GV1/ GV3 Only / Disabled / C States Only / Enabled 
39
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