15" PowerBook G4 GPU Thermal Pad

Discussion in 'PowerPC Macs' started by Altemose, Jun 20, 2014.

  1. Altemose macrumors G3

    Altemose

    Joined:
    Mar 26, 2013
    Location:
    Elkton, Maryland
    #1
    I was given a 1.67 GHz PowerBook G4 that runs on the hot side and also has a loose hinge on the right side. I am going to repaste the CPU and in the process also remove the display and tighten the hinge. When taking apart my 1.5 GHz PB I realized the GPU uses a type of thermal compound I have never seen. It looks like a pad's thickness but in the shape of an X. I left it alone and reassembled the Mac without issues with GPU heat.

    That being said, this one always ran hotter than the 1.5 no matter what. I know the paste and pad is on its way out. My question is, what do I put on the GPU? For the CPU I am using Arctic Silver Ceramique 2.
     
  2. eyoungren macrumors P6

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    Phoenix • 85037
    #2
    I'm not sure of what type of thing you have going here. But I will just say that when I put my logicboard in recently, I used AS5 on all three chips. Heat hasn't changed much from what I was experiencing with the old board.

    Don't expect much of a change here either. The 1.67 puts out a lot of heat.
     
  3. Altemose thread starter macrumors G3

    Altemose

    Joined:
    Mar 26, 2013
    Location:
    Elkton, Maryland
    #3
    I know about the heat but this "material" on the GPU looked really thick to be paste but I have never seen a pad in the X format. I wonder what the Apple Service book would say on this. I don't want to risk burning out my GPU.
     
  4. sarthak macrumors 6502

    Joined:
    Nov 19, 2012
    Location:
    Canada
    #4
    Would be helpful if you can share some pics.

    I've seen regular "square" thermal pads which end up burnt with a hole in the center over ~5 years. Never seen a cross pattern pad.
     
  5. Altemose thread starter macrumors G3

    Altemose

    Joined:
    Mar 26, 2013
    Location:
    Elkton, Maryland
    #5
    When I take the machine apart I will take a picture. I have to remove the whole display assembly so the Logic Board is coming off anyway.

    [​IMG]
     

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