Intel S2600IP Service Guide - Page 134

BIOS Setup Utilities Comments: This option allows the user to choose a Fan Profile that is optimized for maximizing performance or for minimizing acoustic noise. When Performance is selected, the thermal conditions in the system are controlled by raising fan speed when necessary to raise cooling performance. This provides cooling without impacting system performance, but may impact system acoustic performance - fans running faster are typically louder. When Acoustic is selected, then rather than increasing fan speed for additional cooling, the system will attempt first to control thermal conditions by throttling memory to reduce heat production. This regulates the system's thermal condition without changing the acoustic performance, but throttling memory may impact system performance. 4. Fan PWM Offset Option Values: [Entry Field 0 - 100, 0 is default] Help Text: Valid Offset 0 - 100. This number is added to the calculated PWM value to increase Fan Speed. Comments: This is a percentage by which the calculated fan speed will be increased. The user can apply positive offsets that result in increasing the minimum fan speeds. 5. Quiet Fan Idle Mode Option Values: Enabled Disabled Help Text: Enabling this option allows the system fans to operate in Quiet 'Fan off' mode while still maintaining sufficient system cooling. In this mode, fan sensors become unavailable and cannot be monitored. There will be limited fan related event generation. Comments: When enabled, this option allows fans to idle or turn off when sufficient thermal margin is available, decreasing the acoustic noise produced by the system and decreasing system power consumption. Fans will run as needed to maintain thermal control. The actual decrease in fan speed depends on the system thermal loading, which in turn depends on system configuration and workload. While Quiet Fan Idle Mode is engaged, fan sensors become unavailable and are not monitored by the BMC. 122 Intel® Server System R2000IP Service Guide