nMP iStat Menu "ambient sensor 2" temperature too high.

Discussion in 'Mac Pro' started by orpheus1120, Jan 2, 2015.

  1. orpheus1120, Jan 2, 2015
    Last edited: Jan 2, 2015

    orpheus1120 macrumors 65816


    Jan 23, 2008
    Hi guys, would like your comments about my nMP.

    I've been using iStat Menu 5 for quite some time now, and today I had a look at the stats of my nMP, and was alarmed to see the temperature of my ambient sensor 2 about 10℃ higher than ambient sensor 1 and sensor 3, highlighted in red. If you guys don't mind taking a look at my stats, I would really appreciate it.

    Just a brief overview, my system is nMP 8-core, D700, 1tb SSD, 64GB Ram, with dual 27" TB  Cinema Displays. The nMP is is placed at the right end of the dual displays, against a wall with a 2-inch gap.

    Here are the stats, in celcius and corresponding values in fahrenheit.

    [​IMG] [​IMG]

    I can't explain why the temperatures for ambient sensor 2 varies so much from the other 2. The only guess I could come up with is probably dusts getting sucked into the system and perhaps disrupted the airflow to the ambient sensors. My table can get rather dusty quickly. The fact that the temperature is in RED, kinda worried me. Is there a cause for concern?

    Should I take the nMP apart, and give it a couple of sprays of compressed air?

    Thanks in advance.
  2. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    I didn't own a nMP yet. So can't compare your reading to mine.

    However, the ambient temperature doesn't really matter. The real important reading is the CPU and GPU temperature, they looks all good.

    iStat will turn any number in red above a predetermined level. AFAIK this level is nothing related to your nMP's real limit. It may even turn some number which actually the higher the better into red (e.g. the "Core 0 relative to ProcHot" in cMP).

    I don't know if there is any risk to open up a nMP and clean it. However, it if works properly, better not to touch it. Especially if you still have Apple care, better to call them ask for further advice, or ask them to clean it.
  3. SuperMatt macrumors 6502a


    Mar 28, 2002
    I turn off and unplug my nMP every so often, take off the outer cover, and clean out all the dust I can. I can get quite a bit out of there without touching anything "sensitive" while doing it. Not sure if this affects temp sensors at all.

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