1 2 3 4 5 Previous Next 63 Replies Latest reply: Feb 12, 2010 3:46 AM by Mike Hume Go to original post
  • 15. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    Very cool. Post back if you will with what you find out.
    I have to wonder if he'll really get any answers though, his higher ups can be difficult, even to him.
  • 16. Re: iTunes or Audio increases cpu temperature
    Vidkidd Level 1 Level 1 (0 points)
    This has concerns out of the norm. The product has been designed to run cool and quiet...

    A normal operation like audio decoding... Shouldn't effect CPU heat so drastically.
  • 17. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    I would think so too. I wonder what happens in my Mom's G5. I'll check that out tomorrow.
  • 18. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    Vid,

    This has come up before. I posted a link up above from when it first caught my eye, and it was a true pain trying to figure it out, which I never did.
    But something did happen a couple times that was contrary to common sense.
    An experiment for you... Launch the Temp monitor of your choice.
    Launch iTunes and play a tune, preferably The Beatles.
    When the temps are good and high, launch Mail and Safari...
    Tell me how your temps react.

    I wonder if what I saw a few times is what you will see. If you do, that is truly bizarre.
  • 19. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    Well, Mike, and one and all... this may be of interest to you. This phenomena does not occur on my old G5 Quad. The CPU temps stay the same. Now that is pretty +(inset word of choice)+ strange.
  • 20. Re: iTunes or Audio increases cpu temperature
    Vidkidd Level 1 Level 1 (0 points)
    The issue also does not occur on a 2006/2007 mac pro or the 2008 Mac Pro.

    Even stranger...
  • 21. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    Yikes, you're right. That is even stranger. Any word from your Apple Tech?
  • 22. Re: iTunes or Audio increases cpu temperature
    The hatter Level 9 Level 9 (58,880 points)
    Blame it on H-T and not using the latest Intel code libraries?

    But I think some have tried disabling HT using XCode/CHUD.
  • 23. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    I'm ignorant. What is HT?

    Have you heard this news? I bet you have.
  • 24. Re: iTunes or Audio increases cpu temperature
    The hatter Level 9 Level 9 (58,880 points)
    HT had trouble back when it came out with the Pentium.
    HT is what causes you to think you have 16 cores under the hood!

    MardMac is where I stop by along with couple dozen others to find news, so yes, of course, but unless it says "------World" in the name, or "Times of London" or have the IT endorsed seal of approval, IOTW, MSM, it ain't "news." (I get my real news lately from blogs as I can't even trust "all the news that's fit to print" in the gray lady.)
  • 25. Re: iTunes or Audio increases cpu temperature
    Srisri Level 1 Level 1 (15 points)
    Well. I am using istat menus to monitor system parameters, and it has entries for CPU voltage and current, power etc... When the computer is idle, the CPU uses about 5A of current. When I run iTunes, Quicktime or VLC the current draw rises to anywhere between 35A-45A (don't know how accurate istat menus is). As you can guess, the power consumption goes up by approx 50W (cpu voltage is around 1.2v) . The temp. rises by about 8 deg C.
    Yeah, I think too, these programs aren't optimized.
  • 26. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    I know this is probably wrong... but Hyper Threading?

    Well, I've always liked David Pogue. The first Mac book I ever got was "Macs for Dummies", and his writing style and good humor was just what I needed. Still I think I needed a book called "Macs for the dumber Dummies", I was so clueless when I started out. And he was always and still is I think a Mac fan at heart. But the paper itself I've ceased taking seriously a long time ago, though I would like to date Maureen Dowd...

    So it was only yesterday, and correct me if I'm wrong, but with what you and Vidkid said, and testing it on my Quad, this issue with audio and especially iTunes is a Nehalem phenomena.
    Yes, I would think Apple is going to have to address this one and soon. I use iTunes a lot, I don't want to see this Mac get toasted like my G5s.
  • 27. Re: iTunes or Audio increases cpu temperature
    The hatter Level 9 Level 9 (58,880 points)
    There is always wait and sit on the side lines and continue to use 10.5.8 until someone from Intel drops by and points out the error in their ways.

    Hurry up and wait?
  • 28. Re: iTunes or Audio increases cpu temperature
    Samsara Level 4 Level 4 (1,320 points)
    But this was in 10.5.8 too. The original post I linked above was pre SL. I'm wondering now too if this is something that can be addressed from the hardware or software side. As in, did Intel build CPUs for the Nehalem that just do this naturally? And how can there be a gazillion iPods out there seeming to be able to handle this stuff just fine? Or are they? And I've heard a lot about heat issues with the MBPs. Some link there?

    And is it true that the first of the Nehalems were delivered via Black Helicopters? Lol.
  • 29. Re: iTunes or Audio increases cpu temperature
    Vidkidd Level 1 Level 1 (0 points)
    Testing the situation further shows:

    Displaying video from Webcam has same effect.
    Power usage jumps from 2.14watts to 65+ watts - same as full CPU load