Previous 1 2 Next 29 Replies Latest reply: Apr 19, 2013 9:48 AM by MajorMacintosh
MajorMacintosh Level 1 (0 points)

Hi Everyone!

I need some help and I know this is the place to go.

I just picked up a Power Mac G4 1GHz Duel's (MDD) 2002 model, runs like a champ for $0.00. A friend gave me a 1.25GHz Duel 2002 model that won't power up.  Here is my question, because I don't know whats wrong with the 1.25GHz can I swap the processor from the 1.25GHz and use it on the 1GHz model to verify if the processor is good, or if the processor is bad on the 1.25GHz could that damage the motherboard on the working 1GHz machine?


Here are the motherboard model numbers if that helps

1GHz Duel = 820-1453-A (2002)

1.25GHz = 820-1474-A (2002)



My ultimate goal is to find out what is wrong with the 1.25GHz machine, (ie) Power Supply, Motherboard or Processor



Thanks In Advance!


Power Mac G4 MDD, Mac OS X (10.5.8)
  • BDAqua Level 10 (122,252 points)

    Hi, as long as they're the same bus speed should be n problem.


    If you don't know the model, find the Serial# & use it on one of these sites, but don't post the Serial# here...




    How to find the serial number of your Apple hardware product...


  • MajorMacintosh Level 1 (0 points)

    HI BDAqua,


    The bus speeds are the same 167MHz, and both machines are duel's.

    However if the 1.25GHz processor is bad would it damage the working 1GHz motherboard?


    I would hate to damage a "MINT" Power Mac G4 1GHz DP MDD


    Again Thanks In Advance!


  • BDAqua Level 10 (122,252 points)

    I don't see how it could damage the computer in anyway... other than I guess everything has a slim possibility, but I consider that not very likely.

  • Glen Doggett Level 4 (1,840 points)

    If you are going to remove the heatsinks and swap CPUs, you should consider this a good time to clean and replace the thermal paste.

  • BDAqua Level 10 (122,252 points)

    Very good point Glen!

  • Dave Hamilton Level 5 (6,820 points)

    If you don't have heatsink paste on hand, Arctic MX4 would be a good choice, and it doesn't conduct electricity.

  • BDAqua Level 10 (122,252 points)

    Excellent added info, thanks Dave!

  • MajorMacintosh Level 1 (0 points)

    Wow your all great with the responses.


    Here is my game plan:


    #1. I did pick-up some Arctic Silver 5 today, however I have never done this before. Arctic's web site really is geared to the pc side of things. Can someone provide me more info using this thermal grease on Power PC chips?


    #2. What should I clean the Power PC chips with?


    #3. Swap the cards and cross my fingers.


    #4. I will post and let everyone know how this all works out.


    Thanks so much everyone, the Apple Community is the best!


  • BDAqua Level 10 (122,252 points)

    Sadly, japamac has been chased off byi nsults, but...


  • MajorMacintosh Level 1 (0 points)

    Hi Everyone,

    Thought I would update everyone on this.



    Installed to 1.25 DP and it has worked fine.

    Did a fresh install of Leopard + all updates, didn't install anything else


    Played with it as-is to verify stability, (ie) sleep , safari



    Installed iStat


    CPU's running fight now at 119 Deg. Is this OK?


    Put system to sleep and tryed to wake up and got the following "Panic"


    Specs on the hardware are at the bottom.


    Can someone tell me what happened?


    Thanks Again!



    Interval Since Last Panic Report:  9966 sec

    Panics Since Last Report:          1

    Anonymous UUID:                    9F2B750D-3091-48B2-9DED-A2E33946B13A


    Thu Apr  4 16:13:55 2013



    Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000E5C PC=0x00000000000AC6B8

    Latest crash info for cpu 0:

       Exception state (sv=0x18cfe000)

          PC=0x000AC6B8; MSR=0x00001030; DAR=0x00000E5C; DSISR=0x40000000; LR=0x000AC604; R1=0x1D82FCD0; XCP=0x0000000C (0x300 - Data access)


    0x01F96E18 0x0002E14C 0x0003B264 0x0005813C 0x0002C100 0x00024B58

             0x000B45CC 0x00000000

    Proceeding back via exception chain:

       Exception state (sv=0x18cfe000)

          previously dumped as "Latest" state. skipping...

       Exception state (sv=0x1d7a9000)

          PC=0x907B5078; MSR=0x0200F030; DAR=0xE0014000; DSISR=0x42000000; LR=0x907BBFA0; R1=0xBFFFEE60; XCP=0x00000030 (0xC00 - System call)


    BSD process name corresponding to current thread: iStatLocalDaemon


    Mac OS version:



    Kernel version:

    Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC

    System model name: PowerMac3,6


    System uptime in nanoseconds: 3925799583047

    unloaded kexts:          1.3.2b0 - last unloaded 4064650090

    loaded kexts:          2.0.2 - last loaded 1271375364          5.4.8          1.0.6          1.3.2b0          1.0.10f1          1.0.1f2          2.5.8f1          2.5.8f1          1.0.10f1          3.2.0          2.5.8f1          1.7.7          2.2.2          1.5.2d0          1.5.2d0          2.5.8f1          1.0.10f1          2.4.0          1.0.1f1          5.4.8          1.3.2          1.1.0          3.2.0          2.0.9          2.1.1          3.4.9          3.5.2          2.7.91          2.0.6          1.5.3          2.5.6d2          1.5.1d1          1.3.0d0          2.0.0a0          1.0.2f1          1.1.1f1          4.0.0d2          1.3.0d0          1.5.3          1.5.9f1          3.9.7          1.2.1f4          3.4.6          1.7.2f1          3.4.0          1.1.1          107.12          1.8.77          3          199          30.4          1.8.7d5,NVMac.0xdb1f3a0          0.0.4          2.5.8f1          2.5.8f1          2.5.8f1          1.6.9fc5          1.1          5.4.8          1.7.3          1.7.0



    Model: PowerMac3,6, BootROM 4.4.8f2, 2 processors, PowerPC G4  (3.3), 1.25 GHz, 768 MB

    Graphics: kHW_NVidiaGeForce4TiItem, GeForce4 Ti 4600, spdisplays_agp_device, 128 MB

    Memory Module: DIMM0/J21, 256 MB, DDR SDRAM, PC2600U-25330

    Memory Module: DIMM1/J22, 512 MB, DDR SDRAM, PC2600U-25330

    Modem: Dash2, UCJ, V.92, 1.0F, APPLE VERSION 2.6.7

    Network Service: Ethernet, Ethernet, en0

    Parallel ATA Device: PIONEER DVD-RW  DVR-115D

    Parallel ATA Device: ST3160023A, 149.05 GB

    USB Device: Apple Optical USB Mouse, (null) mA

    USB Device: Hub in Apple Extended USB Keyboard, (null) mA

    USB Device: Apple Extended USB Keyboard, (null) mA

  • BDAqua Level 10 (122,252 points)

    If that's 119°F., that's great.


    You may have to uninstall iStat, & what version was it?

  • MajorMacintosh Level 1 (0 points)

    HI BDAqua,


    The iStat version is 2.0, Is that what caused the panic?



  • Glen Doggett Level 4 (1,840 points)

    I have not had luck with waking up from sleep mode (in my G3 and G4) and I have absolutely no idea why.  I changed my energy saver preferences settings to never sleep and never put the hard drives to sleep, I only use the screen saver.  Possibly the hard drive or a PCI/USB/FW peripheral doesn't wake up when it should and then the machine panics?  I have no diagnosis or solution to the wake-from-sleep issue, other than to never sleep. 

  • MajorMacintosh Level 1 (0 points)

    Hi All,

    Just a update and observation.


    I removed iStat will try later this morning how it handles sleep now.


    My experience with sleep on these systems are if you have additional PCI card installed that generaly is the reason they fail to go to sleep on therir own, or create a kernal panic when forced to sleep by using the "Sleep Now" drop down menu. Clearly non Apple software can create issues with sleep.


    Because this has a virgin system install only, I want to verify everything is top-notch before I install anything else.


    See I purchased a new 1.25Ghz DP (MDD) in Spring of 2003, It got damaged in 2007 but I saved everything I could (guts wise, ie: GForce Ti Video Card, Hard Drives) and all the original manuals & discs the only thing I tossed was the box.


    I will try the motherboard from the doner machine soon, the one I got the processors from. I noticed that board has a Bluetooth connection (Motherboard # 820-1474-A) does anyone know where I might get the Bluetooth Module for it? It the connection on the board next to the Airport Card.


    Thanks Again Everyone!

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