2009 Mac Pro Fan control?

Discussion in 'Mac Pro' started by wiski15b, Jul 17, 2017.

  1. wiski15b macrumors regular

    Joined:
    Apr 20, 2016
    #1
    Hey everyone,

    Does anyone know which fans are based on which sensors? Also, which sensor should the CPU fan be based on for optimum CPU cooling? Diode, heatsink, or core PCECI? Ive always set it to read from the diode but not sure if that is best. My system runs pretty hot and runs dangerously hot when grading and rendering the 4k files I'm working with, not to mention all the drives and accessories :/. FYI, I'm using macsfancontrol. Thanks.
     
  2. shuto macrumors newbie

    Joined:
    Oct 5, 2016
    #2
    I found the advice in this thread pretty helpful...
    https://forums.macrumors.com/thread...when-using-pc-non-efi-graphics-cards.1946672/

    I think the main thing is to try and make sure the Power Supply doesn't go over 40 degrees.

    I'm thinking of getting air con in my garden studio office, as the ambient temperature in the room is the thing that enables the fans to cool down the computer, and at the moment when I'm rendering overnight its just blowing hot air around!
     
  3. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #3
    What's the actual number of that dangerous hot?

    If you are not sure, better not to use MacsFanControl and just let the SMC to manage the fan.
     
  4. wiski15b thread starter macrumors regular

    Joined:
    Apr 20, 2016
    #4
    If I remember correctly it's about 80c. Ran it through a bunch of tests months ago. Computer would reboot if it reached a certain temp too rapidly.However, If it was a gradual increase in temp it would sustain and climb in to the 90's without issue during stress test. It's my CPU A which just runs hot. Once I hit render or playback BiG video files, temps spike and the SMC never seams to do the right thing in time. I depend on macs fan control to create a buffer so that they ramp up full about 8c before they get into the 80's. FYI, they are de-lidded x5690's. Thermal paste and installation are fine. I've always had them set to use the diode as a sensor but not sure if heatsink or pce would be better?
     
  5. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #5
    If the heat sink is clean, the temperature should not increase rapidly even with just idle fan speed. Anyway, the SMC may not able to handle properly for self upgrade X5690, because Apple never ship dual 130W CPU option. 80C is actually fine, but 90 is a bit high.

    If you want to lower the CPU A temp a bit by MacsFanControl, just make the boostA fan base on CPU A diode temperature, something like min 60, max 99 should be fine.
     
  6. wiski15b thread starter macrumors regular

    Joined:
    Apr 20, 2016
    #6

    Yeah, I cleaned the heatsink pretty well. Either way not sure what else to do. I was thinking the same thing about the x5690's being non-factory self installed chips, but still odd behavior on my particular system. Like I said it's only when I hit it with a heavy load (which I do often, like converting 4k raw to prores), the temp rises fast and has rebooted my system. Otherwise, if it's normal/heavy work, temps get into the 80s without issue. Even under stress test they have gotten well above 90c without issue. It's only on sudden temp rises from converting and such that I have the issue of rebooting. Either way I think your right and I'll keep it set for Diode. Thanks.
     
  7. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #7
    BTW, did you check the Northbridge temperature?
     
  8. wiski15b thread starter macrumors regular

    Joined:
    Apr 20, 2016
    #8
    Yes, thanks for asking. Surprisingly It never gets too hot. Never had a problem with it (knock wood). I do keep spare spring rivets on hand though ;)
     

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