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  • Turbo Boost Problems Reported with New MacBook Pros


    With the release of the new Sandy Bridge-equipped MacBook Pros, users have been expecting clockspeeds of up to 3.4 GHz with Intel Turbo Boost technology. However, it at least a couple of cases, 13" models with Core i7-2620M processors have been reported to stall out at 2.7 GHz when using Windows. The culprit may be high core temperature, which is not being seen when the 13" is running Mac OS X or at all in the larger models. Other tests show the 13" performing as advertised. So what's going on here?

    Intel upgraded Turbo Boost to take better advantage of the Sandy Bridge microarchitecture on its latest Core Series chips. Like the original algorithm, version 2.0 of the dynamic overclocking feature lets operating systems request more power when power consumption and temperature are below preset limits for the number of active cores, and likewise underclocks when those limits are exceeded. PC Pro's testing showed that the Core i7-2620M in their 13" late 2010 MacBook Pro remained at the rated 2.7 GHz under Windows testing, but temperatures spiked to 93C or about 200F. A similar test by Notebook Journal in Germany actually showed the processor underclocking itself to 798 MHz under load.

    At the same time, Anand Shimpi tested the 13" Pro against his usual Mac OS X SYSMark suite, and found that it was able to boost up to 3.4GHz in single core mode, and 3.2GHz for dual core. His reported core temps went up to 94C when the machine boosted in dual core, indicating that the temperature threshold should not have been the bottleneck for PC Pro. Indeed, in a later update, PC Pro found that Turbo Boost worked properly under Mac OS X, at higher temperatures than it reached un-Boosted under Windows.

    PC Pro speculates that Apple disabled Turbo Boost on MacBook Pros running Windows, or blocked those operating system calls from being sent to the processor, for reasons of heat dissipation. They also noted temperatures spiking up to 99C core, with the underside heating to a painful 60C or 140F. Until this is resolved definitively, users interested in running Windows on the smallest Pro should hold off on purchasing.

    Source: Product Reviews
    This article was originally published in forum thread: Turbo Boost Problems Reported with New MacBook Pros started by Paul Daniel Ash View original post
    Comments 16 Comments
    1. thetoothfairy's Avatar
      thetoothfairy -
      Glad I waited to buy one... I was at the Apple store not to long ago and was going to buy one but was to sick to wait to pay for it so I left empty handed... however I am buying one once I get home if these problems are fixed!
    1. nautical79's Avatar
      nautical79 -
      I'm glad i dont have the money to buy one..... not
    1. bg1's Avatar
      bg1 -
      Quote Originally Posted by thetoothfairy View Post
      Glad I waited to buy one... I was at the Apple store not to long ago and was going to buy one but was to sick to wait to pay for it so I left empty handed... however I am buying one once I get home if these problems are fixed!
      So you're glad that you didn't buy one because it won't turbo boost under windows? The article seems to indicate it is a software issue, so waiting is not going to help in this situation. Now the situation with the flickering externally connected Apple displays, that's a bit more problematic...
    1. AkkeDaBest's Avatar
      AkkeDaBest -
      What did we relearn today? Never buy anything at launch, wait for the stuff you are going to buy getting reviewed propertly.
    1. hookedonkronix's Avatar
      hookedonkronix -
      I have a water-cooled PC and rarely does my CPU go over 40C under load. Seeing 90-99C gives me chills. I did plan on upgrading my MBP. Really glad I waited.
    1. sk8ertim's Avatar
      sk8ertim -
      This is why I hackintosh!
    1. chercm's Avatar
      chercm -
      come on ... stop running Gates software on Job MAC ...

      Windows is just a failure with virus and bugs and best is BSOD which is the best free gift that Gates gave it to the consumer
    1. sziklassy's Avatar
      sziklassy -
      Some responses to those who are having this issue from Steve Jobs himself:
      "You are running it wrong"
      "This is a problem that ALL other notebooks experience"

    1. blueblaze4444's Avatar
      blueblaze4444 -
      This isn't even a problem in my eyes.

      1) I would buy at least a 15" model

      2) I don't ever plan on running Windows on a mac except for possibly my home iMac
    1. teej1410's Avatar
      teej1410 -
      Lol, windows is just slow. I wouldn't use windows on a Mac unless I absolutely have to. Like for using 3DS Max.
    1. GmAz's Avatar
      GmAz -
      Quote Originally Posted by chercm View Post
      come on ... stop running Gates software on Job MAC ...

      Windows is just a failure with virus and bugs and best is BSOD which is the best free gift that Gates gave it to the consumer
      Wow, sounds like you are stuck in the days of Windows 98. I had two BSOD's when I was on WinXP and both were caused by dying hard drives. I had zero BSODs in Vista (ya, it sucked, I know) and still none in Win7. I've never had a virus...ever. I've also never bought anti-virus software. There are plenty of free ones available. Also, all Apple hardware is the same stuff as Windows hardware. See, Apple realized it was sucking a ton when they used to run on PowerPC chips and came over to real hardware.
    1. SoCal Railroader's Avatar
      SoCal Railroader -
      Quote Originally Posted by chercm View Post
      come on ... stop running Gates software on Job MAC ...

      Windows is just a failure with virus and bugs and best is BSOD which is the best free gift that Gates gave it to the consumer
      I was wondering when the "Apple is God, Microsoft is the Devil" speech would come.
    1. Dazz187s's Avatar
      Dazz187s -
      Quote Originally Posted by chercm View Post
      come on ... stop running Gates software on Job MAC ...

      Windows is just a failure with virus and bugs and best is BSOD which is the best free gift that Gates gave it to the consumer
      Thank you, like if you get a Mac, stay with Mac software. Doesn't make sense to "interbreed" the two.
    1. SoCal Railroader's Avatar
      SoCal Railroader -
      Quote Originally Posted by Dazz187s View Post
      Thank you, like if you get a Mac, stay with Mac software. Doesn't make sense to "interbreed" the two.
    1. CabooseLoL's Avatar
      CabooseLoL -
      Quote Originally Posted by chercm View Post
      come on ... stop running Gates software on Job MAC ...

      Windows is just a failure with virus and bugs and best is BSOD which is the best free gift that Gates gave it to the consumer
      Oh my god! Fan boy. Please learn to use a computer before speaking. Learn to use one and you won't have problems with bugs and viruses.
    1. xNEOxGENESISx's Avatar
      xNEOxGENESISx -
      As long as there's no issue in the turbo boost while running OSX and Mac software I'm fine. Plus, even if I do decide to use windows on the new macbook pro, most likely I'll never have to overclock my computer to the point it burns its self out. This really shouldn't be much of a problem.