rMBP, Heat?

Discussion in 'MacBook Pro' started by Sound Evolution, Nov 17, 2012.

  1. Sound Evolution macrumors 6502

    Joined:
    Oct 30, 2007
    Location:
    Netherlands
    #1
    Dear rMBP users,

    Who's rMBP is overheating, throttling too? Or is it just my machine that is not okay?

    When just browsing it already reached temps of 72 degrees Celsius. When doing intensive stuff it become to hot to touch at the upper part and it reaches temps of over 80 degrees Celsius.

    What I don't understand is, that when this happen why the fans never go above 3000rpm.

    The result of this heating is (aside from a way to hot computer) is it starts to slow down, graphics become sluggish and it clearly throttles. It makes working frustrating.

    Do more have this problem?

    See the image, CPU2 is 82 degrees Celsius, but the fans hardly blow. At this point my laptop starts to throttle and performance is sluggish, especially with scrolling through my CAD program.

    Secondly, I have bad image retention. People say "it won't happen when you use your computer normally" well when switching from my design program to another window, I can see my full schematics and design printed into the screen ;) How much more "normal" should I use it...
     

    Attached Files:

  2. markus843 macrumors regular

    Joined:
    Sep 4, 2012
    Location:
    North america
    #2
    I don't have this problem. And for your image retention I suggest sending it in if you're under warranty.
     
  3. T5BRICK macrumors 604

    T5BRICK

    Joined:
    Aug 3, 2006
    Location:
    Oregon
    #3
    Throttling like that doesn't sound normal. I believe some people have been able to solve it with a SMC reset? Give it a try before you send it in for service.

    http://support.apple.com/kb/HT3964
     
  4. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #4
    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.
     
  5. wethackrey macrumors 6502

    Joined:
    Feb 27, 2007
    Location:
    Redondo Beach, California
    #5
    This sounds very abnormal. The thermal performance of my 15" MBPr is the best of any Mac laptop I've owned. Even with multiple VMs running and the processor and memory maxed out, my MBPr runs quite cool. So much so that I've not felt the need to install the new version of Fan Speed Control, an app I found crucial on earlier MacBook Pros. External cooling contraptions should not be necessary on the MBPr.
     
  6. Sound Evolution thread starter macrumors 6502

    Joined:
    Oct 30, 2007
    Location:
    Netherlands
    #6
    I think you right. My co-workers rMBA doesn't get as hot as mine. even with light work and browsing my CPU2 temp is always around 65 a 70 degrees Celsius. My concern is though, How is Apple going to fix this?
     
  7. bobr1952 macrumors 68020

    bobr1952

    Joined:
    Jan 21, 2008
    Location:
    Melbourne, FL
    #7
    I'm pretty happy about the temps on my rMBP so I would think it should run a bit cooler than that especially when just doing easy browsing. My CPU2 (which is often the hottest reading) is currently 39 which is pretty normal. Hottest has been playing World of Warcraft where the fans do ram up to 4K-5K and temps get around 60C--then right back down again.
     
  8. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #8
    Very difficult really, as both computers need to have identical software and usage to be truly accurate regards to a direct comparison. Another consideration is the temperature monitoring software as this must also be aligned, differing CPU`s can and do have differing temperature sensors. So two systems running side by side under the same load one may appear to be superficially running hotter, when measured by differing applications. So back to the OP, is his system running hotter or simply reporting a higher temperature compared to another.

    Bresink`s Temperature Monitor offers an extremely deep evaluation of the systems thermal footprint inclusive of logging and it`s free. A reasonable understanding of use a even seemingly small things can drive up temperature, even web content if related to flash can send a Mac`s thermals through the roof. UltraFan and SMC Fan Control will give a good basic indication of actual CPU temp, many apps will only see "CPU Proximity" and report a lower value (10C - 15C).

    As for Apple they will effect repair only if the system is running out of spec.
     

Share This Page