Mac Pro 5.1 (4.1) with CPU upgrade - overheating

Discussion in 'Mac Pro' started by empezar, Nov 19, 2016.

  1. empezar macrumors regular

    empezar

    Joined:
    Sep 14, 2006
    #1
    Hello!

    I upgraded my Mac Pro 5.1 (which is actually a firmware-upgraded 4.1) with 2x Intel Xeon X5690.

    The processors are now getting quite hot when I do cpu intensive tasks (85-100 depending on how long the run), and I'm wondering exactly what I can do to prevent this.

    Can I lower the voltage? How? I have only seen MacBook Pro "voltage apps" so far.

    Can I replace the cooling? Are there water cooling solutions available? What socket should the cooler support?
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    1) How you measure the temperature?

    2) NO, you cannot lower the voltage

    3) If you do everything correctly, no need to replace the heatsink. Just use MacsFanControl to spin up the fan is good enough.
     
  3. vailance88 macrumors newbie

    Joined:
    Nov 15, 2016
    #3
    Hi, sorry just to ask here, my macpro 5,1(4,1) running 3.33ghz 6 core would like to upgrade to dual processor tray, should i get a 2009 dual proc tray or 2010 processor tray ? since my firmware been upgraded to 2010 5,1 firmware

    ebay for 4,1 tray http://www.ebay.com/itm/Genuine-App...mory-/272366256497?roken=cUgayN&soutkn=QOJH10

    ebay for 5,1 tray http://www.ebay.com/itm/Genuine-App...mory-/272366237319?roken=cUgayN&soutkn=clfonj
     
  4. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    You MUST use the 4,1 tray regardless of firmware version.
     
  5. empezar thread starter macrumors regular

    empezar

    Joined:
    Sep 14, 2006
    #5
    Thanks! MacsFanControl did solve the issue.

    I'm in Windows currently and the temperatures were from the program Core Temp. The temperatures dropped 20 degrees when I turned on sensor based cooling.
    --- Post Merged, Nov 21, 2016 ---
    I am currently running Folding@Home at 100% load on both cpus. The first CPU is 76-84 C warm, while the other cpu is 60-64 C warm. Can I draw the conclusion that CPU 1 should get reapplied thermal paste?
    --- Post Merged, Nov 21, 2016 ---
    upload_2016-11-21_15-34-38.png
     
  6. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #6
    I don't know which CPU is 0 and which is 1, but the CPU in the back of the case will normally run hotter because it is being cooled in part by the warm air from the CPU in front.
     
  7. empezar thread starter macrumors regular

    empezar

    Joined:
    Sep 14, 2006
  8. TheAppleMacMan macrumors newbie

    Joined:
    Sep 8, 2015
    #8
    Just as a footnote to the above, the X5680 and X5690 have a TDP figure of 130Watts I believe, ( whereas the 5670 and 5660 are 95W). That extra 35W per CPU can translate into quite a lot of extra heat under intensive tasks. I notice this with 3D rendering (Cinema 4D). I've found (like advice above), that using MacsFanControl to set the minimum spin speed (idle speed) of the inlet and exhaust fans at 1500/1600 rpm (rather than 1200) did help keep the temps down without making the machine unduly noisy.
    The rear CPU always seems to run hotter by some 6 to 10'C.

    TAMM
     
  9. carpsafari Suspended

    carpsafari

    Joined:
    Sep 13, 2015
    Location:
    the Netherlands
    #9
    Nonsense!

    CPU A always runs hotter than CPU B, because CPU A is cooling the Northbridge chip too!
    Under load usually around 10C difference.
     
  10. rueyloon macrumors regular

    Joined:
    Sep 24, 2013
    #10
    Mine seems to be more than 10c difference, swapped the processor and it is the same. I can even see that CPU A is drawing a higher current. So that seat is powering more than just the processor.
     
  11. carpsafari Suspended

    carpsafari

    Joined:
    Sep 13, 2015
    Location:
    the Netherlands
    #11
    I said 'around 10c' difference, 12-15c I've seen often.

    You might try re'applying the Northbridge chip cooling paste, I had succes with several MP's.
    Not so easy to describe, but when the heatsink is of CPU A, try to 'wiggle' the NB chip, you should be able to feel the difference between dried up paste and paste as it should be.
     
  12. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #12
    I appreciate the correction.
     

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