SMC Fan Control Settings for Mac Pro

Discussion in 'Mac Pro' started by fridgeymonster3, Mar 21, 2009.

  1. fridgeymonster3 macrumors 6502


    Jan 28, 2008
    I was wondering if anyone has any suggestions for settings for SMC Fan Control for a Mac Pro. I've got an early 2008 2.8 8-core and I've been encoding movies for a while now with Handbrake and my temperatures skyrocketed. I jacked my fans up pretty high and it seems to have help, but I wonder if there is a maximum setting for the fans?

    Here's what I have the fans set at right now using SMC:
    CPU_MEM: 1075
    IO: 1200
    EXHAUST: 1000
    PS: 900

    I have to admit, I forgot to take a snapshot of the temps I had before I increased the preset fan settings. I think my memory modules were in the mid-70's Celsius and I wanted them more in the low-60's.

    What temps do you have? And what settings? Also, what temps are too hot?
  2. sboerup macrumors 6502

    Mar 8, 2009
    Mine runs at similar temps and stays around 25C the entire day. No video encoding though . . .
  3. jnsnfl macrumors newbie

    Oct 16, 2009
    MBP '08 2.2Ghz Intel Core 2D 4GBrm 300GB internal

    I downloaded SMCFC 2.2.2 and it didn't work properly so I uninstalled and reinstalled 2.1 and it worked and then upgraded to 2.2.2 and everything works fine; settings wise.

    I've made 12 movies on 8.5G Double Layer DVD's which required hours of disk time creating and moving files. When I'm in the middle of the movie creation my RPM's will climb up above 6000RMP without a real problem and when its done it usually goes back down to around 2000 RPM (still quiet enough for most situations).

    I have set my default setting for running on battery or charging to be a standard speed of 2000 RPM and then when running on AC to run at 4000 RPM. The fan is not loud enough to be a bother with music from my iPod or radio.

    Oh and on the temperature settings I'm seeing the temp go up during the data moves to 76 C or @ 167 F. Normally I'm keeping the temp @ 60C and lower with my settings.

    I was going to leave the standard AC power fan speed low but because the MBP is notorious for poor heat management at the air ports I boosted to a higher rating. Over time this may cause one of the fans to prematurely age but to be honest the fans are capable of 9000+ for short durations.

    Oh and for the temp settings, when I'm running high IO I'm seeing 165+F and 76+C with the fan running at 6K RPM, the temp is running normally in the 120-F and 60-C range under the 4k RPM settings and in the 135+F range under the 2K RPM range.
    Just my settings and conditions, don't know how it will affect you or your system.
  4. iamcheerful macrumors 6502


    Oct 3, 2008
    my memory modules have hit as high as 81ºC but generally, they stay at 78ºC during Handbrake encodes (24/7 those days) these days, the Mac Pro is a little underutilized. :(
  5. cgc macrumors 6502a

    May 30, 2003
    I moved recently from the west coast to the east coast and my 2006 MacPro's temperatures have risen. I'm mostly concerned with my memory and NorthBridge temperatures as they get as hot as 145F and that's with SMCFanControl set to about 1300rpm. Here are my temps in fahrenheit (ambient is about 76F):


    My question is which section in SMCFanControl will get the memory and NorthBridge temps down (cpu, pcie/hdd, rear, and/or power supply)? Thanks.
  6. Apple Corps macrumors 68030

    Apr 26, 2003
    His question is about a Mac Pro - not a MBP :confused:
  7. Pressure macrumors 68040


    May 30, 2006
    The components are all within the safe parameters, so why bother with 3rd party solutions when the Mac Pro is easily able to monitor and act upon the increase in temperatures?
  8. iHateMacs macrumors 6502a


    Aug 13, 2008
    Coventry, UK
    That's what I was thinking. Surely the MP can speed up the fans when it needs it. I've never heard mine speed up yet. I'm not sure what temp would trigger it. Mine idles at around 33C
  9. nanofrog macrumors G4

    May 6, 2008
    They're fine for a 2006 system, as FB-DIMM's and the Northbridge chips do run hotter than other systems.

    So there's nothing to panic over. :D
  10. rockinrocker macrumors 65816


    Aug 21, 2006
    Yeah, you have to really stress these puppies to get those fans to spin up.
    Like... maybe watching a flash video?:D

    But rest assured, they will speed up if the temps get to hi.

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