MBP 15" Early 2011 Overheating/Sleep

Discussion in 'MacBook Pro' started by Feodor, Jul 15, 2012.

  1. Feodor macrumors newbie

    Aug 11, 2011
    I'm used to the loud fan noise and heat after a year, but now my MBP seems to be going to sleep due to heat. I've seen this happen three times so far in the last week, in Legend of Grimrock and Skyrim (both on Windows of course). I'm not certain it's a heat issue but I can't think of anything else that would cause the computer to randomly go to sleep during a video game.

    Anyone had a similar experience? I'm probably going to take it to an Apple store before the warranty goes out. Thanks.
  2. w00t951 macrumors 68000


    Jan 6, 2009
    Pittsburgh, PA
    I've had the exact problem in Windows. My computer is heavily overclocked, and I can squeeze some high FPS's out of that video card. Unfortunately, I was at a relative's house, and she doesn't use her air conditioning. The ambient temperature pushed the computer too hard, and it started sleeping during games of Crysis 2 and Modern Warfare 3. Never happened with Battlefield 3.

    I used GPU-Z logging, and like clockwork, the computer shut down as soon as the GPU diode temperature hit 90C.

    You should do what I did and prop the computer up on something to improve airflow. If you have an overclock, lower the voltage and clocks a bit.
  3. GGJstudios macrumors Westmere


    May 16, 2008
    Heat won't cause your computer to sleep, but it can cause it to shut down. 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 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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