What if I make my fans spin slower manually?
Making the fans spin slow will build up heat on the server board, and voids the server board and processor warranty. The server board may shut itself off unexpectedly. Data may become corrupted and components may become physical damaged. Always follow the posted thermal/mechanical design guides when testing a new chassis or fan setup.
How do I update the field replaceable unit/sensor data record (FRUSDR) information?
Updating FRUSDR for optimum server performance on Intel® Server Boards/Systems guides you through the process
Can I use the FAN PWM (pulse width modulation) offset feature under BIOS setup of Intel® Server Boards with the Intel® S5520 Chipset and Intel® Server Boards with the Intel® S5500 Chipset to customize third party or reference chassis fan speed?
In Intel® Server Boards with the Intel® S5520 Chipset and Intel® Server Boards with the Intel® S5500 Chipset, Intel added a method to customize fan speed for third party or reference chassis using the FRUSDR utility and BIOS configuration. This provides the flexibility to meet user’s varying cooling request. It is the responsibility of the 3rd party chassis vendor to validate the system against all of the fan profiles. The FRUSDR utility allows a user to select a fan profile depending on the server usage when selecting the "Other" chassis option when running the update. The following additional profiles are provided:
- Maximum fan speed
- Server (pedestal) profile
- Data center (rack mount) profile
- Workstation profile
After setting the fan profile during the FRUSDR update, it is recommended that the FAN PWM offset be configured under BIOS setup > Advanced > System Acoustics & Performance Configuration > Fan PWM Offset. The recommended values are between 0 to 100. This number is added to the calculated PWM value (not really a percentage of the actual fan speed).
If calculated value + offset is >100, then the value set will be 100. (It ignores calculations above 100).
Example 1 (customer wants a little faster FSC- fan speed control): If System Fan Speed control calculates a PWM value of 25 (19h) and the Fan PWM Offset is set to 15 in the BIOS, firmware will program a PWM value 25 + 15 = 40 (28h).
Example 2 (customer wants a much faster FSC): If system FSC calculates a PWM value of 35 (23h) and the Fan PWM Offset is set to 75, and the resulting PWM value is 35 + 75 = 105, but the max PWM value is 100. So the PWM programmed is 100 (64h). Any value >100 will result in programming 100.