Temperatures very high on Mac Pro 4,1 5,1

Discussion in 'Mac Pro' started by roblogic1, May 12, 2015.

  1. roblogic1, May 12, 2015
    Last edited: May 13, 2015

    roblogic1 macrumors member

    Joined:
    Oct 2, 2014
    #1
    Hi

    I have this Mac pro with the X5690 CPU upgraded and I wonder if the readings of the temperature are normal. They seem very high to me!.

    Northbridge Chip 107-115 ºC
    IOH Heatsink 96 ºC

    The BOOSTA reads 0 in red (So it seems broken).

    Any feedback will be highly appreciated.
     
  2. dmylrea macrumors 68000

    dmylrea

    Joined:
    Sep 27, 2005
    #2
    What the heck is a "3369"?
     
  3. davidlv, May 12, 2015
    Last edited: May 13, 2015

    davidlv macrumors 65816

    Joined:
    Apr 5, 2009
    Location:
    Kyoto, Japan
    #3
    You may want to read about issues related to the Northbridge Heatsink retainers in several articles available at http://www.xlr8yourmac.com/
    (scroll down). My 2009 MP shows 72 ºC for the NB chip under a normal load.
     
  4. roblogic1 thread starter macrumors member

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    Oct 2, 2014
    #4
    Sorry my mistake I mean the X5690 CPU, 3.46ghz, 2 CPU for 12 cores
     
  5. roblogic1 thread starter macrumors member

    Joined:
    Oct 2, 2014
    #5
    Thanks very useful info!

    What it does not say is the normal temperature at which NorthBridge chip should operate. Is there any risk if I leave them running at 90 - 115 ºC ?
     
  6. benjaprud, May 13, 2015
    Last edited: May 13, 2015

    benjaprud macrumors member

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    Apr 9, 2015
    #6
    Mine has been recently cleaned and operates at 59°C northbridge and 48°C heatsink under load (doesn't vary much with load though). I guess dual-cpu might run a bit hotter. Sometime ago the temps used to climb around 80°C causing the CPU booster fan to run constantly at 1000-1100 RPM (well I guess it was the cause). Cleaning the whole CPU tray did the trick for me (it had never been done for 4 years) but some had issues with the northbridge heatsink plastic retainers that can break over time as described in the link. If you get no reading from the CPU booster fan you might want to check if it's working as well and properly seated following the CPU upgrade (the one that's inside the CPU heatsink, I don't know how this translates on a dual-cpu, are there two readings like BoostA and BoostB ?).

    In general chips don't like to operate much higher than 90°C as it increases the chances of failure/malfunction. Most manufacturers seem to design their systems so that the chips temps does not exceed 83-85°C. Most chips are designed to operate at 105-115°C maximum. It seems your northbridge is right on the edge and I wouldn't recommend leaving it as is.
     
  7. mikeboss, May 13, 2015
    Last edited: May 13, 2015

    mikeboss macrumors 65816

    mikeboss

    Joined:
    Aug 13, 2009
    Location:
    switzerland
    #7
    I predict that OS X will start to crash at some point because the northbridge will become unstable if running at these temperatures. I wouldn't want to run my machine with a broken BOOSTA fan...
     
  8. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #8
    May be you read the wrong number. The northbridge can only be hotter than the heatsink. If the northbridge heatsink is at 59C, the northbridge chip should be around 70C.
     
  9. benjaprud, May 13, 2015
    Last edited: May 13, 2015

    benjaprud macrumors member

    Joined:
    Apr 9, 2015
    #9
    Yeah sorry I missed a line in MenuMeters it was 59°C northbridge and 48°C heatsink (46° was the PSU), now up a few degrees after 3 hours of gaming (63°/51°).
     

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