Slightly Concerned (Apple RAM temperature)

Discussion in 'Mac Pro' started by Infrared, Apr 3, 2008.

  1. Infrared macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #1
    I'm slightly concerned about the temperature of
    a B2 memory module:

    Ambient: 25C (77F)
    Mem Module A1: 48C (118.4F)
    Mem Module A2: 51C (123.8F)
    Mem Module B1: 52C (125.6F)
    Mem Module B2: 60C (140.0F)

    All 4 modules in A1, A2, B1 and B2 are identical
    Apple 1GB modules[1]. 60C (140F) for B2 is when
    idling. Under load yesterday it reached 74C (165F),
    but I suspect it might go higher if really pushed.

    [1] Identical in the sense of same speed and capacity.
    It could be that the added modules were made by a
    different manufacturer. Oh, and I did just slap the new
    modules in A2 and B2 without first moving B1 to A2. I
    figured the move wouldn't be necessary given that they're
    all 1GB modules. Maybe I reasoned incorrectly.
     
  2. pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #2
    You should have moved the module B1 to A2 and then added the new ones to B1 and B2.

    Your temps seem fine to me.
     
  3. bigbird macrumors 6502

    Joined:
    Aug 17, 2007
    Location:
    Canada
    #3
    If you don't have SMC Fan Control, download it and set your CPU fan to about 1 000 rpm. You'll hardly hear the increased fan speed and your RAM modules should stabilize at 50C or less.
     
  4. Infrared thread starter macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #4
    Why, please? Isn't that advice for when the new
    memory doesn't match the existing memory?

    The memory I've added is the same as the existing
    memory, as regards speed and capacity.

    Thanks.
     
  5. Infrared thread starter macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #5
    I just phoned Apple and they said it didn't matter that the B1
    memory wasn't moved to A2 since the memory is all of the
    same type (all 1GB modules). I hope the person I spoke to
    was right - it can get very confusing discussing all these slots.
     
  6. rockinrocker macrumors 65816

    rockinrocker

    Joined:
    Aug 21, 2006
    #6
    my 2 gig modules get up to 160F under load....
     
  7. bld44 macrumors 6502

    Joined:
    Apr 21, 2007
    #7
    Mine typically run about 160F, sometimes a little hotter. You're fine.
     
  8. mcvaughan macrumors 6502a

    Joined:
    Aug 9, 2007
    Location:
    Houston, TX
    #8
    Those temps don't seem high to me. I wouldn't be concerned.
     
  9. pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #9
    The only reason why I suggested that is because I feared that even though it came from Apple they may have used a different supplier for the RAM. For example, Apple uses different brands of optical drives in the Mac Pros... I was just being safe...
     
  10. Infrared thread starter macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #10
    Ok, fair enough. I'm not sure the supplier is a factor. Some have
    said the manufacturer of the RAM must be matched, and that
    may be true. But I haven't seen an explanation of why that might
    be true - just a few cases where it has or hasn't worked.

    This is where one needs to know a little bit about what's happening
    under the hood. We can say this person had this configuration and
    it didn't work, so this or that may be true. But there's a limit to how
    far we get with that kind of argument based on anecdotes.
    Unfortunately most arguments hereabouts are of that type.
     

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