3 Replies Latest reply on Sep 18, 2013 9:33 AM by sylvia_intel

    DP55WB - Processor Fan slowed or stopped - PWM failure?

    MarkA

      Intel DP55WB

      i5 CPU 750@2.67GHz

      Windows 7

      Bios: WBIBX10J.86A.0190.20.10.0.0112.0119

      Processor Fan: Arctic Freezer 7 Pro Rev2. (supports PWM).

       

      I have been using this setup for about 2 years (often at high CPU loads for a number of days running complex math models).

       

      Last week I get a message from Intel Desktop Utility “ Failure [Processor Fan] slowed or stopped” . Sure enough the fan was slowed – but still working. The thermal marginal was reduced compared to where it usually sits. Speed fan confirmed no RPM on processor fan.

       

      Went to BIOS – also no fan speed detected. If automatic control of fan speed disabled then fan spins at 2000rpm. Have replaced fan. Made no difference.

       

      This is the most current BIOS firmware.

       

      Has the PWM failed?

       

      Tx