Macbook Pro Retina gets Extremely hot!

Discussion in 'MacBook Pro' started by djschep, Aug 31, 2012.

  1. djschep, Aug 31, 2012
    Last edited: Aug 31, 2012

    djschep macrumors member

    Joined:
    May 23, 2012
    #1
    Hey guys,

    I have a Macbook Pro Retina with all the settings on max (see below). I like to play games like Diablo 3 and World of Warcraft howvere when I open these up my macbook starts going crazy! The fans all turn on and the CPU get extremely hot! I mean like 92°C hot! I opened up activity monitor and found out that when running World of Warcraft it used 140-160% of the CPU (which of course in impossible!!).

    Thanks in advance for any advice!

    Derek Schep

    Macbook Pro 15-inch Retina:
    Processor 2.7 GHz Intel Core i7
    Memory 16 GB 1600 MHz DDR3
    Graphics Intel HD Graphics 4000 512 MB
    Please comment with any further questions and I will try to get you any information!
     
  2. charlieegan3 macrumors 68020

    charlieegan3

    Joined:
    Feb 16, 2012
    Location:
    U.K
    #2
    "World of Warcraft it used 140-160% of the CPU (which of course in impossible!!)."

    picture of this?
     
  3. MysticDragon macrumors newbie

    Joined:
    Aug 27, 2012
    #3
    A lot of mac users on the WoW forums have complained about the same issue since the 5.0.4 patch.
    Pre-patch temps and fan noise was low/normal, but post-patch temps are crazy.

    Hopefully there is a fix for it soon.

    EDIT: Also, the over 100% cpu is showing multiple cores, so it's very possible to be over 100%. However WoW usually isn't that intensive.

    (http://forums.macrumors.com/showthread.php?t=1186691)
     
  4. djschep thread starter macrumors member

    Joined:
    May 23, 2012
    #4
    Here you are:
     

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  5. charlieegan3 macrumors 68020

    charlieegan3

    Joined:
    Feb 16, 2012
    Location:
    U.K
    #5
    yeah amazed that it's getting this high for one app, crazy.:confused:
     
  6. cathul macrumors member

    Joined:
    May 5, 2008
    #6
    It's adding up for each core that get's used up by the application... two cores fully used equals 200%. As the rMBP has 4 physical cores and 2 threads per each core it is theoretically possible that it goes up to 800% (if my findings are correct).
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    That's perfectly normal. 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:
    No, it's not impossible. Your Mac has a quad-core processor, so up to 400% (100% for each core) is possible.
     
  8. djschep thread starter macrumors member

    Joined:
    May 23, 2012
    #8
    Okay cool, I understand the 150% part but It heats up like a rocket and i find it very scary, this is a screenshot from iStat literally 2mins into starting up WoW, my imac also gets very hot!

    Hope I can get anymore info!

    Derek Schep
     

    Attached Files:

  9. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    There's no more information to get. If you place high demand on your computer, such as intensive gaming, temps are going to be high. It's as simple as that. MBPs aren't specifically designed for gaming. If that's your primary purpose, there are gaming computers designed to handle those demands.
     
  10. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #10
    and they are definitely not thinner than 1". More like 1.5"+. Thanks to all the metal and extra fans needed for heat dissipation.
     
  11. boydp182 macrumors newbie

    Joined:
    Aug 13, 2010
    #11
    I wonder why the MacBook Air doesn't suffer the same problem. I returned my MacBook pro retina. Within 5 minutes of using it the heat was more than I would like on my lap. I actually stared sweating a little. Never had that problem with the MacBook Air. I am guessing since the air uses lower voltage chip and nn retina it doesn't have the same issue but not sure.

    MacBook air is best laptop on the market but damn I love that retina display.
     
  12. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #12
    Simple the Air is nowhere near as powerful as the Retina, the MBP`s quad core processor and discrete GPU are the primary culprits for the temperature...
     
  13. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #13
    No this is normal behaviour same as my 15" Retina. If you are concerned about temperature and want to reduce it elevation of the rear of the machine helps, as sitting flat on the desk only reflects the heat back to the base of the Mac. You can buy passive aluminium coolers like Rain Designs Mstand or iLap. Most powered coolers are designed for PC notebooks and don't work overly well with Mac`s if at all. One cooler that does work efficiently is the Moshi Zefyr 2, as it`s principle of cooling is specifically designed for Apple portables, by blowing the air horizontally across the base of the computer, however don't expect miracles.
    [​IMG][​IMG]
    [​IMG]

    Link: Moshi Zefyr 2
    A cheap USB fan can achieve the same if strategically placed, not as elegant mind, nor as easy to put in your notebooks case :p but they do help to reduce case temperatures.

    You can use software to override Apple`s own cooling algorithm by manually taking control of fan RPM and setting up power profile presets with SMC Fan Control 2.4, or here with UltraFan which allows you stipulate a preset temperature and the software will automatically raise and lower fan RPM`s to keep the system at the predefined temp, which i personally feel is a far more elegant solution. At the end of the day you want to control your system temperature, not your fan rpm`s. For me SMC is now pretty much redundant with the latest release of UltraFan having manual control of the fans RPM, and subsequently i am starting to uninstall it from my own Mac`s. SMC FC is a great app, however although it`s recently updated, functionality is limited compared to some newer apps, equally SMC Fan Control is rock steady stable and a finished product.

    Strictly speaking Apple`s own cooling algorithm works, albeit at sacrifice of increased temps for quieter operation. This has always been the Apple way and is really nothing detrimental to the system, i have one MBP from 2008 all original barring a recent fan change that has an uptime of over 30K hours. The latest MBP`s need less assistance in remaining cool; for some it`s simply disconcerting the heat generated and transferred to the case, although it`s perfectly normal as the aluminium acts as a heat-sync. i have to deal with elevated ambient temperature so at times a software solution is useful. Apart from the passive cooling the Mstands bring they also offer a very sound ergonomic solution. A passive cooler and UltraFan will maximise the cooling, there is little else you can do short of reducing the ambient temperature or the system load. If I know i am going to push a system i will close all apps that are not essential as this can and does make an impact to system temperature.

    High temperatures in general is not overly harmful to your systems, what is far more detrimental is thermal stress, where temperatures rapidly fluctuate by significant margins over a short period of time. Anyone striving for great longevity should look to minimise rapid temperature changes, here UltraFan is your best friend.

    Using a RainDesign Mstand, a Moshi Zefyr 2 and latest version of UltraFan I can reduce temperature by over 20C when transcoding an MKV video file, and that is something worth thinking about;

    • Apple default cooling algorithm 99C - 103C (still on Mstand) fans 4K and escalating :eek:
    • Mstand, Zefyr & UltraFan 79C - 82C fans at 5.8K :cool:

    Recently i have been experimenting with a CoolerMaster Notrepal E1 cooling pad, it has a single very large fan 23CM (9") running at 800 rpm, and most importantly moving a significant 91.25 CFM, this is far more than most other powered coolers i have tried.

    [​IMG]
    [​IMG]
    [​IMG]
    The fan by far takes up the majority of the coolers body, runs slow and quiet.

    As it`s designed for a PC portable i didn't have any high expectations; the cooler runs quiet as in silent, perfect size for a 15" MBP, has USB expansion, single speed with on/off button and lifts the machine a good couple of inch`s of the desk. I chose my Late 2011 2.4 i7 15" MBP, it`s connected to an external display, runs 24/7 and is generally north of 70C (158F) on any given day. Any software solution only results in the MBP doing a fair impression of a "Turbojet" which we all love to loath, as workloads rise and temperatures increase.

    The important part cooling; well as ever with a Mac a mixed bag, the elevation definitely helps versus being flat on the desk. I have little expectation of any cooler reducing a Mac`s internal temperature significantly, what the Notepal E1 was able to do was systematically reduce fan rpm by a good 1K without any increase in internal temperatures, which is a big step forward. With this cooler and a software solution (UltraFan/SMC Fan Control) it`s possible to have a moderate load and a relatively quiet system, and that counts for a lot. The major downside to the Notepal E1 is the size, it`s clearly designed to be "planted" on the desk. when using the 10 degree angle i use a piece of that rubber you can buy for car dashboards, just to ensure the MBP doesn't slip and slide about, just seems prudent with such an expensive notebook perched on the edge of the desk. The Notepal E1 also unusually blows a stream of cool air out of the front to cool the hands which is well unusual, nevertheless not unpleasant on a hot day.

    I still rate the Moshi Zefyr 2 as the best powered cooler for a Mac portable simply due to it`s continuous horizontal air flow, however the pricing and availability make it a tough choice. 1K reduction in fan speed may not sound that big a deal, however if that keeps the Mac below the "Turbojet' threshold then it`s a worthwhile investment for anyone seeking the quieter life :p

    The old adage still applies; it`s easier to keep a system cool, than cool-down an already hot machine. This being said it`s not strictly necessary, equally it`s nice to know that there are options for reducing temperature out there.
     
  14. knljz macrumors newbie

    Joined:
    Apr 8, 2013
    #14
    One thing you can do is to disable the ready boost function of the CPU to lower the temperature, on my PC this can really lower the heat.

    The method could be found in the below link, but I haven't tested that cause I don't have a Mac...
    https://github.com/nanoant/DisableTurboBoost.kext
     

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