The intel cases have much better values for these.ġ9 // Control Value 1 (Percentage) (19h = PWM 25%)ġC // Control Value 2 (Percentage) (1Ch = PWM 28%)ģ2 // Control Value 3 (Percentage) (32h = PWM 50%) The value of 64 in the left column is what controls this. It clearly shows that it intends to run the fans at 100%. Stepwise Linear type Temperature Sensor Sub-recordĦ4 // Temp Sensor failure control Value (64h = PWM 100%)Ĥ1 // -Supported in S1 (1=yes) -Reserved -Control Type (001b=Stepwise linear)ġ0 // Temperature Info -Reserved -Domain Maximum=0 -Negative Hysteresis=2 -Positive Hysteresis=0Ġ3 // Count of Temperature/Control Value Pairs (03h = 3)Ħ4 // Control Value 1 (Percentage) (64h = PWM 100%)Ħ4 // Control Value 2 (Percentage) (64h = PWM 100%)Ħ4 // Control Value 3 (Percentage) (64h = PWM 100%)

Fan Control Domain Number # 1 (PWM1: System Fan5 Rear Fan)ĠC // Record Subtype Value (Fan Speed Control SDR Record, rev 2)Ġ1 // Fan Control Domain Number # 1 (PWM1: System Fan5 Rear Fan)ġ4 // Normal Control Value (14h = PWM 20%)įF // Boost Control Value (FFh = PWM 255%) Chassis Fan Control Domain 1 with profile 1,2,3,4 Here is an example of code taken from the SDR file:

There are multiple settings for each fan profile, and settings for the Processor fans which need to be changed as well, but as long as you follow the same basic process it's fairly simple, just repetative. This is an example of how to change the Fan 5 profile setting.

Lm fancontrol no processor fan