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IDProjectCategoryView StatusLast Update
0002094SpeedFanFan controlpublic2013-01-23 19:53
Reporterwolfv6Assigned Toalfredo 
PrioritynormalSeverityminorReproducibilityalways
Status assignedResolutionopen 
PlatformIntel Core i3-2105 CPUOSWindows 7OS VersionService Pack 1
Product Version4.47 
Target VersionFixed in Version 
Summary0002094: CPU fan idles too fast
DescriptionThe CPU fan idles at 700 RPM.
Fan speed goes above 2000 RPM after every boot, wakeup, and high CPU temperature.
Once the fan gets above 2000 RPM, the fan idles at 2000 RPM.
To get idle fan idle speed back down to 700 RPM, I rest "Thermal Cruise" manually:
 Configure > Advanced > Chip: Nuvoton NCT6776F
 change "PWM 2 mode" Property to "Manual" Value, then back to "Thermal Cruise", click OK
I repeat this after every boot, wakeup, and high CPU temperature.
Steps To ReproduceHere is how I Configured my SpeedFan:
Readings tab > Configure button
 > Temperatures tab > CPU
    > Core0
      > Desired:40 C, Warning: 60 C
      > check: CPU
    > Core1
      > Desired:40 C, Warning: 60 C
      > check: CPU
 > Fans tab > uncheck all except for CPU Fan
 > Speeds tab
    > uncheck: Sys and Aux
    > check: CPU, Minimum value: 0%, Maximum value 90%
      check: Automatically variated
 > Fan Control tab > check Advanced fan control
    Fan controllers: CPU Fan Control Strategy1
    check: Controlled speed
    select: CPU - CPU from Nuvonton NCT6776F (temperature sensors)
    Method: MAX of speeds
    Temperatures: Core0, Core1
    Response: for both Core0 and Core1,
        adjust blue curve to pass through (36C,0%),(48C,30%),(60C,100%)
        Hysteresis: 1 C
 > Advanced tab > Chip: Nuvoton NCT6776F
    select Property "PWM 2 mode"
    set Value to "Thermal Cruise"
   check: "remember it"
Additional InformationWhen UEFI fan setting is "Automatic", and SpeedFan is off, CPU fan idles at 2000 RPM.
SpeedFan idle speeds are the same if UEFI fan setting is "Full On" or "Automatic".

The PC only has one fan. The CPU fan is a Rosewill RCX-Z90-CP:
    RPM 600 ~ 3000 ±10%
    4 Pin (PWM) power connector
    92mm PWM Fan
TagsNo tags attached.
Motherboard ModelASRock H61M/U3S3 LGA 1155 Intel H61 HDMI SATA 6Gb/s USB 3.0 Micro ATX
Video Card Modelinbedded in the Intel i3-2105 CPU

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Issue History

Date Modified Username Field Change
2013-01-23 19:53 wolfv6 New Issue
2013-01-23 19:53 wolfv6 Status new => assigned
2013-01-23 19:53 wolfv6 Assigned To => alfredo