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Imac 27 runs hot as ****, won't sleep, and cpu runs wild in w7

23197 Views 45 Replies Latest reply: May 3, 2010 2:29 PM by ALFREDOLEMA RSS
  • zeb3000 Calculating status...
    I have EXACTLY this issue.
    And after upgrade to BootCamp 3.1 the 16bit color issue.
    This is solved with another hardware vendor's video driver because Nvidia do not provide notebook drivers to end users.
    But back to this case....

    I have contacted Apple 2 times here in sweden and they replied the first time:
    "Contact Microsoft for fix for their OS". (and he contacted 2nd level and they referred to Microsoft too)
    This is an issue with a couple of bad Windows drivers provided by Apple for Windows.
    The second time I called, the technician called some 2nd level support too and he was a bit more intelligent... He confirmed that this was an issue with the BootCamp drivers but could say when or if Apple would fix this.
    There wasn't any internal release info or other internal "how-to-fix" info.
    I'm a first time Mac buyer and it started with the iPhone... perhaps Apple should care more about their Windows customers? We have pockets with money that Dell, HP, Acer and other got in the past... now we are spending it on Apple products..... Care a bit more about us, thank you.
    This is serious audio and video driver issues that would be considered alpha drivers elsewhere.
    So, we'll just have to wait to 3.2 bootcamp or specifically released drivers.
    iMac 27" i5, Windows 7, iPhone 3G 16GB
  • WebPhenom Level 1 Level 1 (0 points)
    C'mon Apple lets get this fixed!
  • ALFREDOLEMA Calculating status...
    Same problem... iMac 27" Quad Core i5 4 gb ram.. Apple please.. HELP US!!
    iMac 27 " Quad Core i5, Mac OS X (10.6.2)
  • synergy2000 Calculating status...
    I have a feeling that Apple considers Windows 7 as a biggest threat to Snow Leopard OS and doesn't like you to run them in your Mac.

    I personally think that the Windows 7 is as lean as the Mac OS and runs just as good and fast, perhaps better, too.

    If all the drivers for the magic mouse, headphone jack, and the graphic card works just as good as they are on the Mac OS, you got the best Windows PC in the market.

    We the owners need to push Apple to bring out the drivers soon otherwise we have the conflicts of interest going on.
    iMac, Wintel
  • vhen Calculating status...
    Exact same here: iMac 27" Core i7, * expensive machine, Bootcamp Win7. 4th core running at 90% when I plug something in the jack.

    Unbelievable. Since early january this is going on and nobody cares at Apple?

    I also agree. I'm an intermittent Mac user, but mostly culturally PC. I decided specifically to buy this thing because I could run Windows 7 64-bit on it.

    If I can't use a * headset on it, I'd say I was robbed.

    Message was edited by: vhen
    iMac 27" Core i7, Windows 7, Bootcamp 3.1
  • vhen Level 1 Level 1 (0 points)

    Dudes, you're fixed!

    If you just plug in your speakers and then just ease them back out about half a mil, just at the threashold of the natural click, then you're set!

    The CPU usage drop back to normal, and the sound goes through the cable. I don't know what the hardware/software interaction is there (maybe to do with the trrs implementation?), but it works this way.

    Hope you're all as relieved as I am.

    (found this here, post #22:


    iMac 27" Core i7, Windows 7, Bootcamp 3.1
  • vhen Level 1 Level 1 (0 points)
    Hey by the way, any of you guys experiencing crazy network latency on the WiFi?

    My 2Mbytes pers second connexion doesn't go past 10kbytes on Win7, sometimes OK for a while, most of the time *****.

    I've had to plug in an external USB WiFi adaptor to get back to normal. Lots of key driver issues on that Bootcamp, hey? I *think* (because I didn't notice it before) that it's the Bootcamp 3.1 that created that problem. Not sure. And I can't be bothered to go back to 3.0 now that I have the **** thing working.

    *Update: No, now I remember, had the same issue before, as it took me forever to download Bootcamp 3.1. So that latency issue was there before, but I thought it was related to the CPU hogging. I only realised that it was the headset later. Then I was left with the latency.

    Message was edited by: vhen

    Message was edited (twice) by: vhen
    iMac 27" Core i7, Windows 7, Bootcamp 3.1
  • marcope Level 1 Level 1 (0 points)
    well, yeah, this back-easing thing worked for me.. strange way to do it, but hey, for now I´m cool.. thanks and regards, Marco
    imac 27", Windows 7
  • jornsby Calculating status...
    You can add me to the list of having this problem. I boot up Win 7 and within a few minutes the fan is running very loudly. With nothing open the CPU is running at 16-17%. If I unplug my external speakers the CPU usage instantly drops to 0%. Plug them back in and instantly jumps up to 16% again.

    Very annoying. The only good thing is that at least the problem is identified. Not to mention I have the display issues everyone is complaining about as well.
    iMac 27" i7, Mac OS X (10.6.2), Windows 7 x64
  • boz0 Calculating status...
    I'm having the exact same problem. Thanks for the tip with the stereo jack, btw.

    Running Windows 7 (home 64-bit), the iMac idled at 70/75°C. Easing back the jack, the temp went down to 55/60°C while gaming, and below 50°C when idle.

    I'll have to check whether the power saving features kick in. I never imagined it could be related to the stereo jack!

    FYI, I assumed this was SPDIF-related and tried to disable the SPDIF output on the sound card, but it didn't solve the problem.

    Please Apple, this really needs fixing.
    iMac 27", Mac OS X (10.6.2), 2.4 GHz 15" MBP
  • Echtzeithölle Calculating status...
    same here, win 7 (tried 32 and 64 bit), 4th core at 80 - 90 %.
    such a expensive computer and nevertheless teething problems -.-
    that's a shame, really...
    iMac 27 i5 :: MBP Late 2007 :: iPhone 3G, Mac OS X (10.6)
  • synergy2000 Level 1 Level 1 (0 points)
    The summer is around the corner and the iMac i7 is not getting any cooler than it's necessary.
    If any of the internal hardwares goes bad due to heat, there will be massive return authorization requests happening soon or later. Please come up with the newer updated drivers as soon as possible.

    I'm already worrying about the longevity of the graphic card, the hard drive, motherboard and the LCD panel as well.

    I love the iMac design and the design alone is going to make many PC folks to switch to Apple. But procrastinating software updates are not a wise choice for Apple to compete against Windows. There are many good softwares avaiable only for Apple and the cooler, trouble free Windows 7 OS performance will advance the Apple to the competitive edge.
    iMac, Wintel
  • Rmoran Calculating status...
    Thanks vhen, this works for me.
    But this is only a temporary fix.

    I bought the fastest iMac for the best performance, and this is slowing me down as much as 25%. There needs to be a legit fix ASAP.
    2.8GHz Quad-Core i7 iMac 27" (Late 2009), Windows 7
  • djsomi Calculating status...
    Its crazy guys, I have the same issue under Vista. My 4th core is going to 100% when I plug anything into the speakers jack. (digital cable also).

    Another thing is the display adapter problem.. Crashing or color banding errors. I'm totally unhappy, so expensive machine and useless with windows. I give 1-2 months than I will pass my Imac away coz its just a nice big nettop atm :(:(:(:(

    imac 27" I7, Windows Vista
  • djsomi Level 1 Level 1 (0 points)

    How did you solved the video driver problem? I found a zip called Working ATI Drivers for iMac It was almost good for win7, but not for vista. There is still no working display adapter driver for ati 4850. (or maybe i cant find any)

    Message was edited by: djsomi
    macbook 13" / imac 27", Mac OS X (10.5.7)


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