5 Replies Latest reply: Aug 11, 2011 10:57 AM by colforbinphan
colforbinphan Level 1 Level 1

Hi Folks

I am running a compression on Compressor 3 and when the power adapter is plugged in, it say it is not charging. The battery also seems to drain rather quick when this application is processing.  If anyone can give me a suggestion that would be swell!

 

thanks

MIke


Mac Pro
Solved by soundman1024 on Aug 11, 2011 10:17 AM Solved

I think this is normal behaviour.  The AC adapter can only provide 85 watts of power (on 17 inch models) that must be shared among the processor, hard drive, display, etc.  For some perspective a MacPro tower (without a display) uses 144 watts sitting idle. ( http://www.anandtech.com/show/3969/apple-mac-pro-mid-2010-review/7 )  You can imagine when the computer is under a load 85 watts is barely sufficient.

 

If you're going to be doing some serious transcoding or compression (Q-Master, Adobe Media Encoder, mpeg Streamclip) make sure you have some juice to start out with.  Connected peripherals (like a bus powered hard drive) are detracting from that 85 watts you have available, so if you need as much battery as possible when compression is over unplug peripherals (hard drives not being used, card readers, phones, etc.), turn off wireless radios (WiFi, BT, 3G/4G USB modems, etc) and lower the display brightness.

 

I'm not sure why, but it seems I have abused parenthesis in this post.  Sorry about that.

Reply by javabob on Aug 11, 2011 8:39 AM Helpful

Your profile says Mac Pro, but you must mean a Mac Book Pro with the intergrated battery? Try resetting the SMC:

  1. Shut down the computer.
  2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
  3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
  4. Release all the keys and the power button at the same time.
  5. Press the power button to turn on the computer. 
        Note
    : The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

From http://support.apple.com/kb/HT3964

All replies

  • colforbinphan Level 1 Level 1

    If it any help,....it only seems to happen when compressor is processing. I am not sure if I was clear on that. 

  • javabob Level 3 Level 3

    Your profile says Mac Pro, but you must mean a Mac Book Pro with the intergrated battery? Try resetting the SMC:

    1. Shut down the computer.
    2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
    3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
    4. Release all the keys and the power button at the same time.
    5. Press the power button to turn on the computer. 
          Note
      : The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

    From http://support.apple.com/kb/HT3964

  • colforbinphan Level 1 Level 1

    Thanks Bob

    I did that last night, but in fact I realized that the compressor was causing the computer to display the Not Charging notification....

     

    So my thinking is the computer is "not charging" because so many processes are running that it is taking it straight from the 120v.

  • soundman1024 Level 2 Level 2

    I think this is normal behaviour.  The AC adapter can only provide 85 watts of power (on 17 inch models) that must be shared among the processor, hard drive, display, etc.  For some perspective a MacPro tower (without a display) uses 144 watts sitting idle. ( http://www.anandtech.com/show/3969/apple-mac-pro-mid-2010-review/7 )  You can imagine when the computer is under a load 85 watts is barely sufficient.

     

    If you're going to be doing some serious transcoding or compression (Q-Master, Adobe Media Encoder, mpeg Streamclip) make sure you have some juice to start out with.  Connected peripherals (like a bus powered hard drive) are detracting from that 85 watts you have available, so if you need as much battery as possible when compression is over unplug peripherals (hard drives not being used, card readers, phones, etc.), turn off wireless radios (WiFi, BT, 3G/4G USB modems, etc) and lower the display brightness.

     

    I'm not sure why, but it seems I have abused parenthesis in this post.  Sorry about that.

  • colforbinphan Level 1 Level 1

    Thank you soundman, I believe you have answered my question!

     

    saves me a trip to the Apple store, even though I still want to go!