1 2 3 4 5 6 7 Previous Next 94 Replies Latest reply: Jul 17, 2007 7:01 PM by mt2 Go to original post
  • 45. Re: SMC Firmware Clamps Processor Speed?
    dalamar70 Level 1 Level 1 (0 points)
    I installed the firmware update but didn't have too much time to play around with it. While plugged in, my CPU temperature under "normal" operation (e.g., web browsing) is still about the same as before the update--60-65C. However, the fans now come on much stronger when the CPU is under load. Running two "yes > /dev/null"s, the CPU temperature gets up to 90C at first, but then drops back down to 79C after about another minute. The case also feels cooler, but again this was just after about 10 minutes of testing.

    The CPU speed idles around 1500MHz while plugged in, and it does get up to 1833 under load. I haven't unplugged the thing yet though (still conditioning the battery).
  • 46. Re: SMC Firmware Clamps Processor Speed?
    Rich88 Level 1 Level 1 (0 points)
    I have run all the software and firmware updates except iPod to date, incl. the latest firmware update which I ran last night. Idle is right at 1500 and temp around 57 C. I just ran Photoshop Elements to see if I could enage the processors more and did get a fat 2K Mhz and 60 C. So far I'm not aware of slowdowns, but I haven't run anything challenging today. My MBP does "seem" to be running somewhat cooler; I'll keep monitorig that (last week it was like typing on a toaster oven surface). Mine's an early-made MBP.
  • 47. Re: SMC Firmware Clamps Processor Speed?
    jeffleeismyhero Level 1 Level 1 (0 points)
    My temperature at 100% is between 94 and 100 degrees. Im guessing that this is not good. (Plugged in). It is 74 degrees in the room as well.

    This is after the SMC firmware update.

    Screen shot: http://www.fireball3d.com/mbtemp.jpg

    Anyone else see this kind of temperature?
  • 48. Re: SMC Firmware Clamps Processor Speed?
    aitim Level 1 Level 1 (30 points)
    As i state @ before, the speed down to 1ghz after i had upgraded SMC 1.0, but when i turn it off for 2 hours and turn on again, it back to normal, now the max. clock speed is 2.16.

    The only different is i am using the AC power adaptor & unplug the battery before, and now, i am using battery only, funny.
  • 49. Re: SMC Firmware Clamps Processor Speed?
    AndrewProudlove Level 1 Level 1 (0 points)
    Hi, i just thought Id let you know that I installed CoreDuoTemp on my 2ghz Macbook Pro and for me the cpu seems to be scaling fairly well.

    Ive been plugged into power the whole time and the first thing I tried was two terminals plus "yes > /dev/null" to get the cpu up and I got to 2ghz with a temp of around 79 to 80

    Just running safari with three tabs Im on 1500mhz with 52C

    When I was messing around in finder I dropped to 1333mhz and at one point when I wasnt doing anything and the computer was just sitting there it dropped to 1000mhz.

    So far so good.

    Btw Interestingly under XP on the same machine encoding a video the processor was on 1500 according to system properties.


  • 50. Re: SMC Firmware Clamps Processor Speed?
    Ed Hurtley Level 1 Level 1 (115 points)
    I ran the SMC update on my first-batch 2.0 GHz MacBook Pro.

    CoreDuoTemp says 1GHz, 2GHz max, current 1.5 GHz. This is unplugged and in 'Better Battery Life' mode. Encoding an H.264, it jumps right up to 2 GHz.

    As for CoreCuoTemp being a Widget? I'd like it's functionality added to iStat nano... (It can't see temperatures on the MBP, and doesn't have a frequency monitor (which would go nicely on the 'CPU' page.)

    (I'm also waiting for Intel to release their Processor Identification Utility for OS X.)

    On a side note, my screen-brightness whine seems to be diminished (but not gone.)
  • 51. Re: SMC Firmware Clamps Processor Speed?
    erik graham Level 3 Level 3 (645 points)
    just ran smc update:

    CoreDuoTemp (version .51)


    Temp: 58 C
    CPU Usage: 3.0%
    Mini 1000
    Maxi 2167
    Current 1667

    When running a few apps, with CPU usage up to 50%:

    Temp: 64 C
    CPU Usage: 52%
    Mini: 1000
    Maxi: 2167
    Current: 2167

    So I don't think there is any clamping going on.
  • 52. Re: SMC Firmware Clamps Processor Speed?
    macomrade Level 1 Level 1 (0 points)
    I just updated my MacBook Pro 2 GHz with the SMC Firmware release and there was no change in system performance or thermal integrity. CoreDuoTemp displays a nominal 58 degrees Celsius idling @ 1.5 GHz with 2-4% CPU load while typing this reply.

    Running 2 "yes > /dev/null" terminal shells clocked out the frequency @ 2 GHz however, did not engage the internal fans until the temperature reached 84 degrees Celsius whereas before the update, the fan engaged when the temp hit 75. It is now holding at 79 degrees with the fans slightly churning, clocking in @ 2 GHz with the above terminals active. Terminating the shells brings the clock back to 1.5 GHz and quickly reduces the thermal load to a reasonable 62 degrees in an impressively short amount of time (under 30 seconds) which articulates the superior design of the MacBook Pro when it comes to thermal discharge.
  • 53. Re: SMC Firmware Clamps Processor Speed?
    Phil Ta Level 6 Level 6 (10,400 points)
    No, the fast drop in temp just shows how processor load is related to the amount of electricity flowing through the chip and heat generated. The heat sink and casing of the MPB do not drop 20 degrees in 30 seconds..
  • 54. Re: SMC Firmware Clamps Processor Speed?
    bcarlton727 Level 1 Level 1 (10 points)
    how do you find out how hot your computer runs?
  • 55. Re: SMC Firmware Clamps Processor Speed?
    Doug Smith ATX Level 1 Level 1 (15 points)
    I believe 100 is the max the CPU is rated for. I'd take it to a service center immediatly if I were you.
  • 56. Re: SMC Firmware Clamps Processor Speed?
    dryan Level 1 Level 1 (5 points)
    Mine seems to be running just fine. Moving from 1500-1833 on AC and steady at 1500 on battery. Temp is several degrees cooler in C.
  • 57. Re: SMC Firmware Clamps Processor Speed?
    jkc120 Level 1 Level 1 (40 points)
    Does anyone know if Compusa is an
    authorized repair center? Do they replace the paste
    if I take it in there?

    They are, if there is one close by that's listed on apple's page, but I wouldn't bother. I took mine to CompUSA for a heat issue (this is the 2nd time in, the first time I sent it in via the Apple store). They called me the next day and told me it's "getting very hot" and that they were sending it in to Apple. Great, so they'll replace the logic board blindly again for me and send it back hot still. sigh.
  • 58. Re: SMC Firmware Clamps Processor Speed?
    MBPdoc Level 1 Level 1 (10 points)
    Mines running very much cooler and if I have 15 browser windows up I will see that processor speed is ramped to 2000GHz! Sweet!
  • 59. Re: SMC Firmware Clamps Processor Speed?
    seagonus Level 1 Level 1 (25 points)
    Yes, I have seen that kind of temperature--in grade 9 science class when we inserted a thermometer into boiling water. It is also the same temperature you drop pasta in to cook for dinner--to bad you can't use your MBP to cook eh?