IOH Heatsink & CPU B Core 0 Relative to ProcHot

Discussion in 'Mac Pro' started by blacka4, Nov 30, 2014.

  1. blacka4 macrumors 6502

    Joined:
    Sep 28, 2009
    Location:
    Pittsburgh
    #1
    Can someone help me here, new to my pro and the IOH heatsink at title is above 165 and the CPU B by just plain a few short youtube videos is over 162. Can someone point me in a direction to get these temperatures down?

    CPU B Core 0 Relative to ProcHOT is a full 10 degrees hotter then CPU A Core 0 Relative to ProcHOT

    Thanks a bunch guys.
     
  2. freshbread macrumors member

    Joined:
    Nov 1, 2008
    #2
    Having recently upgraded my Mac Pro with new cpus I am looking at the same things myself. I don't know for sure but I believe your temps are okay but a little worrisome. Also the relative temps should be high. Higher is better--this is your comfort zone. Consider reapply thermal paste or giving your hex screws a 1/4 turn depending on how you can to your machine. All of this assumes mp tower.
     
  3. blacka4 thread starter macrumors 6502

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    Sep 28, 2009
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    Pittsburgh
    #3
    Thing is I have not done anything to this machine but a hard drive wipe and boot it up. It was a friends studio machine. And I thought it had an easy life.
     
  4. snorkelman macrumors 6502a

    snorkelman

    Joined:
    Oct 25, 2010
    #4
    Rel to prochot is how far away from max temp your processors are currently at

    Pretty sure IOH heatsink is around 70deg C which isnt far off your value for it in degrees F
     
  5. blacka4 thread starter macrumors 6502

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    Sep 28, 2009
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    Pittsburgh
    #5
    Can you explain how far away? It keeps going up so I'm confused
     
  6. flowrider macrumors 603

    flowrider

    Joined:
    Nov 23, 2012
    #6
    Assume you're talking Fahrenheit. And yes, your temps are very high. I'm running X5677 (8 core @ 3.46MHz) in my 5,1 and at rest (not being pushed) I'm at around 100° to 105° for heatsink "A" and 90° to 95° for heatsink "B".

    The things I would do:

    1. Open up the machine and clean the CPUs and reapply thermal compound.

    2. Use a program to manually control fan speeds, and increase the stock speeds. I use Mac's Fan Control. See attached screen shot.

    Edit - if your talking relative to hot, then your not so bad. I'm at 140° and 152° respectively.

    Lou
     

    Attached Files:

  7. blacka4 thread starter macrumors 6502

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    Pittsburgh
  8. flowrider macrumors 603

    flowrider

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    Nov 23, 2012
  9. blacka4 thread starter macrumors 6502

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    Sep 28, 2009
    Location:
    Pittsburgh
    #9
    I think part of my problem is I had my power setting all messed up because I am using it as a iTunes server for my house and just left it on. With out sleeping. Then I figured out I can let it sleep and the Apple TV will wake it if I turn on Wake on LAN
     
  10. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #10
    Your Mac Pro is very cool indeed. That's 160F away from processor hot state.
     
  11. blacka4 thread starter macrumors 6502

    Joined:
    Sep 28, 2009
    Location:
    Pittsburgh

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