Macbook Pro ideal temperatures

Discussion in 'MacBook Pro' started by papatoony, Oct 28, 2012.

  1. papatoony macrumors newbie

    Jun 12, 2012
    I recently upgraded my MBP to a 7200rpm HDD and knew going into it that it would make my laptop run a bit warmer. To monitor everything I'm running iStat Pro and indeed it has heated up since I've installed the new drive. iStat Pro gives me eight different temperature readings though, and they all vary quite a bit. Which ones should I be watching most closely? And what are the ideal parameters? I notice the Ambient temp is usually higher (sometimes quite a big higher) than the HD temp. I've seen it as high as 121F. Heatsink B and Mem Module A1 (whatever those are) tend to be the warmest even when the MBP isn't doing anything demanding...upwards of 115F. So I guess I'm just wondering which numbers are most important to keep an eye on and what are safe temps for them? And what exactly do all these different temperatures measure, anyway? For example what's Ambient measuring?

  2. mrsir2009 macrumors 604


    Sep 17, 2009
    Melbourne, Australia
    I don't think you need to worry about temperatures just because you're using a 7200RPM hard drive instead of a 5200RPM one. The extra heat caused by the change in hard drive would be negligible at best. You're MacBook Pro can't get fried if it gets too hot anyway, as it will automatically shut down if it gets too hot. If you're MacBook Pro's fans are constantly droning then you may have a problem, but if not, don't worry about it :)
  3. papatoony thread starter macrumors newbie

    Jun 12, 2012
    Thanks...I guess I won't worry about it then. I just freak out at the idea of possibly damaging my precious Macbook lol
  4. GGJstudios macrumors Westmere


    May 16, 2008
    The CPU and GPU are the two primary furnaces, but you really don't need to watch them closely. Your Mac will manage temps automatically.

    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)

    If you're not already using it, iStat Pro (free) or iStat Menus ($16) will give you accurate readings of your temps and fan speeds, among other things.

    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, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. 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.)

    The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best.

    Learn about the fans in your Mac
    Apple Portables: Operating temperature

    For Flash-related issues:

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