My 'new' Mac Pro and temps

Discussion in 'Mac Pro' started by Pjotr28, Mar 18, 2013.

  1. Pjotr28 macrumors member

    Mar 3, 2013

    After some debate with myself, the forum and my wallet I decided to give my mac pro 4.1 a new life.

    So the 4.1 2.66ghz quad core with a ati 4870 is now a 5.1 3.33 six core with a GTX 670.

    Luxmark sala cpu gives: 553
    Luxmark sala cpu and gpu gives: 1733 was 595

    Only concern, as I'm not that experienced in thermal pasting, is the temperature. When doing luxmark with temp monitor the cpu a temperature diode goes up to 70 degrees celsius. I normal working mode temp is around 35.
    But I notice that the fans keep spinning. I did a pram reset.

    Is this ok?
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Your temps are quite normal. If you're not already doing so, use iStat Pro (free) or iStat Menus ($16) to get accurate readings of your temps, fan speeds, etc., rather than relying on your sense of touch or sound. A forum member has posted a copy of iStat Pro that has been "tweaked" to enhance compatibility with Mountain Lion. You can download it here.

    The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)

    Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.

    It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.

    Your fans are always on when your Mac is on and they will spin faster as needed to keep temps at a safe level.

    If your fans are spinning up without increased heat, try resetting the SMC.
    (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)

    Learn about the fans in your Mac

    For Flash-related issues:
  3. Pjotr28 thread starter macrumors member

    Mar 3, 2013
    Thanks for this great complete reply. So no worries for now. I'm gonna play with my new Mac Pro. :)
  4. Mac Hammer Fan macrumors 6502a

    Mac Hammer Fan

    Jul 13, 2004
    Congratulations with your New Mac Pro. I have a 2.66/4.1 too and I am looking forward to turn it in a 5.1/3,33 6 cores.
    But are the fans noisier than before?

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