SUPER MICRO Computer X7SBL-LN1/LN2 System Temperature, Fan1 Fan, Fan Speed Control Modes

X7SBL-LN1/LN2 User's Manual

provide PECI counts as references for fan speed controls. So all our Intel processor-based motherboards will be/have been updated to change the CPU temperature display from numbers (absolute temperatures) to text (low, medium, and high).

Each processor has a DTS and every processor’s DTS is individually cali- brated at the factory. DTS’ function is to provide digital data that informs the system of the processor’s thermal throttle point. Since this value varies for every processor, it is impossible to assign a particular temperature level at the BIOS level. Instead, Intel developed PECI. PECI reports a negative value expressing the information imbedded in DTS and subtracting from it the current temperature reading. For example, if the assigned DTS thermal throttle point value in a processor is 85 °C and the current temperature read- ing is 35 °C, the value reported by PECI would be -50 °C. This PECI ‘count’ is monitored by your Supermicro motherboard and has been confi gured to display information according to a particular PECI ‘count’. These are displayed in the BIOS as Low, Medium and High. A reading of “High” means that the PECI count has exceeded the DTS thermal throttle point (PECI count of zero and above).

The information provided above is for your reference only. For more informa- tion on thermal management, please refer to Intel's Web site at www.Intel. com.

System Temperature

This item displays the absolute temperature as detected by the BIOS.

Fan1 - Fan 5

The BIOS will automatically display the status of the fan as specifi ed.

Fan Speed Control Modes

This feature allows you to decide how the system controls the speeds of the onboard fans. The CPU temperature and the fan speed are correlative. When the CPU on-die temperature increases, the fan speed will also increase, and vice versa. If the option is set to “4-pin”, the fan speed will be controlled by Pulse Width Modulation (PWM). Select “Workstation” if your system is used as a Workstation. Select “Disable” to disable the fan speed control function to allow the onboard fans to constantly run at full speed (12V). The Options are: 1. Disable and 2.

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