1 Reply Latest reply on Oct 14, 2017 2:28 PM by N.Scott.Pearson

    NUC5i5RYB intermittent video output and overheating

    rajil

      Hello,

       

      I have a NUC NUC5i5RYB with firmware version RYBDWi35.86A.0354.2016.0120.0912 (Release Date: 01/20/2016, BIOS Revision: 5.6) running Gentoo Linux. The NUC boots up fine and the display comes up. However, after running for a few minutes the screen starts to flicker and it then blanks out the screen.

       

      The sensors package reports the following in idle conditions:

       

      # sensors

      acpitz-virtual-0

      Adapter: Virtual device

      temp1:        +27.8°C  (crit = +110.0°C)

      temp2:        +29.8°C  (crit = +110.0°C)

       

      coretemp-isa-0000

      Adapter: ISA adapter

      Physical id 0: +100.0°C  (high = +105.0°C, crit = +105.0°C)

      Core 0:         +99.0°C  (high = +105.0°C, crit = +105.0°C)

      Core 1:        +100.0°C  (high = +105.0°C, crit = +105.0°C)

       

      nct6776-isa-0a00

      Adapter: ISA adapter

      Vcore:                  +1.81 V  (min =  +0.00 V, max =  +1.74 V)  ALARM

      in1:                    +1.35 V  (min =  +0.00 V, max =  +0.00 V)  ALARM

      AVCC:                   +3.31 V  (min =  +2.98 V, max =  +3.63 V)

      +3.3V:                  +3.31 V  (min =  +2.98 V, max =  +3.63 V)

      in4:                    +1.00 V  (min =  +0.00 V, max =  +0.00 V)  ALARM

      in5:                    +0.00 V  (min =  +0.00 V, max =  +0.00 V)

      in6:                    +0.12 V  (min =  +0.00 V, max =  +0.00 V)  ALARM

      3VSB:                   +3.30 V  (min =  +2.98 V, max =  +3.63 V)

      Vbat:                   +3.23 V  (min =  +2.70 V, max =  +3.63 V)

      fan1:                     0 RPM  (min =    0 RPM)

      fan2:                  8333 RPM  (min =    0 RPM)

      SYSTIN:                 +26.0°C  (high =  +0.0°C, hyst =  +0.0°C)  ALARM  sensor = thermistor

      CPUTIN:                 +85.0°C  (high = +80.0°C, hyst = +75.0°C)  ALARM  sensor = CPU diode

      AUXTIN:                 +86.0°C  (high = +80.0°C, hyst = +75.0°C)  ALARM  sensor = CPU diode

      PCH_CHIP_CPU_MAX_TEMP:  +99.0°C  (high = +80.0°C, hyst = +75.0°C)

      PECI Agent 0:          +100.0°C  (high = +80.0°C, hyst = +75.0°C)

                                       (crit = +105.0°C)

      PCH_CHIP_TEMP:           +0.0°C 

      PCH_CPU_TEMP:            +0.0°C 

      intrusion0:            OK

      intrusion1:            OK

      beep_enable:           disabled

       

       

      The temperature seems high. Could this be the reason why the video is blanking out and how can i reduce the temperature?

        • 1. Re: NUC5i5RYB intermittent video output and overheating
          N.Scott.Pearson

          First of all, the RY NUC has an NCT5577D SIO, which offers only a  subset of the sensors offered by the NCT6776D SIO. As a result, some of the readings that you are looking at are spurious or incorrect.

           

          That said, yes indeed, your processor is severely overheating. This tells me that one of two things is occurring:

           

          • The BIOS' fan speed control programming is incorrect. I suggest that you do the following:
            • Make sure you are running on the latest available BIOS.
            • Go into BIOS Setup (Visual BIOS) and try setting the fan speed control programming as follows:


          • We know that the blower is operating properly (we have a non-zero speed). If the heatsink has separated from the processor (or TIM is insufficient), however, the blower is not going to be extracting the proper amount of heat from the processor. The only solution to this issue is to attempt to fix it. Alternatively, if you do not want to attempt this yourself and you are still within your warranty period, you could contact Intel Customer Support and request a replacement.

           

          Hope this helps,

          ...S