Fan noise getting higher

Discussion in 'Mac Basics and Help' started by smuxyz, Jul 25, 2012.

  1. smuxyz, Jul 25, 2012
    Last edited: Jul 25, 2012

    smuxyz macrumors newbie

    Jul 29, 2011
    My fan noise has been increasing the past week. Now I can't even watch a 1080p movie on my MBP 13" from last year without the fans spinning up to around 4000rpm. I know that's not a lot but it's more than it used to and during the movie I can hear the fan noise - and the MBP gets a little hot.

    Should I be concerned? Or maybe cleanse my fans?


    I run Lion as I haven't upgraded it to ML yet.

    EDIT: I'm now running ML but haven't checked if the fan noise is louder than usual.
  2. Mozzalicious macrumors member

    Jul 16, 2012
    I'm no expert at all, but hopefully I'll be able to help a bit or give you some ideas. You could try cleaning out your fan. Also be aware of what you're running in the background as well. Could it be that lately you happen to run a lot of programs at once?

    If nothing else you could possibly take it to an Apple store and ask. It could just be nothing more worrisome than essentially "old age" for a laptop. Or if you're taking up a lot more of your harddrive then you used to it could just be that theres more programs, etc for your laptop to load than before.
  3. GGJstudios macrumors Westmere


    May 16, 2008
    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 they're 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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