1 2 Previous Next 29 Replies Latest reply: Apr 19, 2013 9:48 AM by MajorMacintosh Go to original post
  • 15. Re: Power Mac G4 MDD
    BDAqua Level 10 Level 10 (116,470 points)

    It sure appears that way.

  • 16. Re: Power Mac G4 MDD
    BDAqua Level 10 Level 10 (116,470 points)

    A possiblly cheaper BT option, for 10.3.9 & up...

     

    http://eshop.macsales.com/item/IOGear/GBU421/

  • 17. Re: Power Mac G4 MDD
    MajorMacintosh Level 1 Level 1 (0 points)

    Hi All,

     

    Update:

    I have a USB Bluetooth adapter from IOGEAR #GBU421 but not working on this system.

     

    I have a question on the processor upgrade, everything seams to be working, however now

    the L3 Cache is 1 MB (per CPU) shouldn't it be 2 MB (per CPU)?

     

    The 1.25 DP processors came from a FW 800 machine, what would be different in those processors?

    I understand the differences in the motherboards between these two machines, but the processors.

     

    Any Ideas Anyone!

    Thanks

  • 18. Re: Power Mac G4 MDD
    BDAqua Level 10 Level 10 (116,470 points)

    Apple

    The first appearance of DDR technology in Apple computers was not in main memory,

    but in the form of the backside or ‘L3’ cache interfaced to the Motorola PowerPC G4

    7450 CPU. The early Apple processor design utilized 1MB of DDR cache (the

    PowerMac G4 733 using the Digital Audio motherboard.) Other designs use 2MB of

    DDR cache for L3, although some of the recently introduced Apple offerings have moved

    back down to 1MB of L3 DDR.

    www.powerlogix.com/downloads/SDRDDR.pdf

  • 19. Re: Power Mac G4 MDD
    Dave Hamilton Level 5 Level 5 (6,805 points)

    According to this, the only FW800 processor with 2MB of L2 cache per CPU was the dual 1.42GHz.

  • 20. Re: Power Mac G4 MDD
    BDAqua Level 10 Level 10 (116,470 points)

    Great work/find Dave, thanks!

  • 21. Re: Power Mac G4 MDD
    Dave Hamilton Level 5 Level 5 (6,805 points)

    oops.. I meant "L3".

  • 22. Re: Power Mac G4 MDD
    MajorMacintosh Level 1 Level 1 (0 points)

    Hi All,

    Mystery Solved.

    I did have a 1.25GHz DP (MDD) new in 2003, and it did have 2MB of L3 Cache (per cpu). I used to boot into OS 9.2.2 so it was not a FW800 machine. What I did forgot was the 1GHz DP (MDD) had only 1MB of L3 Cache. That explains why I have only 1MB Cache is because this was originally a 1GHz machine before I upgraded the processor, and yes the doner machine I got the processers is a FW800 DP 1.25GHz again at 1MB Cache.

    Thanks for everyone's input.

     

    The Following is taken from Apples Spec Sheets

     

    Power Mac (MDD)

    M8573LL/A   Dual 1.25GHz PowerPC G4    2MB DDR SRAM per processor   

    M8689LL/A   Dual 1GHz PowerPC G4         1MB DDR SRAM per processor

     

    Power Mac (FW800)

    M8841LL/A   Dual 1.42GHz PowerPC G4    2MB DDR SRAM per processor   

    M8840LL/A   Dual 1.25GHz PowerPC G4    1MB DDR SRAM per processor

  • 23. Re: Power Mac G4 MDD
    BDAqua Level 10 Level 10 (116,470 points)

    Whew, great to hear, good work!

  • 24. Re: Power Mac G4 MDD
    romko23 Level 2 Level 2 (395 points)

    You can also use the dual 1.42 in a non-FW800 MDD.. I have done this myself when I used to own one and it ran just as fast.. My original processor was the Dual 1.25 w/2MB L3 Cache, so there were 2MB L3 cache dualie 1.25's.

  • 25. Re: Power Mac G4 MDD
    MajorMacintosh Level 1 Level 1 (0 points)

    Hi romko23,

    That's great information. I have a question, would that 1.42GHz boot into OS 9?.

     

    Another question I would like to post to everyone is:

    The FW800's could not boot into OS 9 directly, so is it the motherboard, or is it the processors that limit

    the booting into OS 9?

     

    Thanks Everyone!

  • 26. Re: Power Mac G4 MDD
    BDAqua Level 10 Level 10 (116,470 points)

    It's the Logic board, faster CPUs can boot OS9.

  • 27. Re: Power Mac G4 MDD
    romko23 Level 2 Level 2 (395 points)

    Sorry didn't get back fast enough.. Yes, even if its a 1.42 and the logic board is non-fw800.. it will still boot into OS 9 without any problem.. The FW800 is the hardware and the chip which prevents it from booting into OS 9 as OS 9 does not support FW800.

  • 28. Re: Power Mac G4 MDD
    Ramón G Castañeda Level 4 Level 4 (1,445 points)

    BDAqua wrote:

     

    Sadly, japamac has been chased off by insults…

     

    That is truly despicable.  An incalculably GREAT LOSS for this forum. 

  • 29. Re: Power Mac G4 MDD
    MajorMacintosh Level 1 Level 1 (0 points)

    Hello Everyone,

    Wanted to give you all a update since my last posting.

     

    Looking for a 1.42GHz (DP) daughter card and heat sink from a FW800 (anyone have one?)

     

    Started having some issues with the power supply AcBel #APl1PC36 Rev.B. Causing intermittent lock-ups waking from sleep and such. I have this connected via ADC to my Apple Cinema HD Display 23". As I

    understand this display uses apx. 70 watts that is drawn from the PSU. It looks like I will need to rebuild the PSU as some capacitors with age are failing. Before I go on, yes I do know you can mod and install a standard pc PSU but you loose two very important functions. #1 You can't use a ADC display, #2 Sleep can be a issue, as pc PSU's don't provide the 5V needed for deep sleep. With that said, I will replace a large portion of the capacitors. I will keep you all posted on this project. My resource for this project is "http://www.badcaps.net".

     

    Also has anyone replaced the fans on the PSU and the CPU with something else, as these Mac's are 11+ years old, I wonder if "Today's Fan Technology" will help in the airflow and noise department? If you have, please post what you used and if you needed to do anything with the wires, allot of today's fans are 3 and 4 wire, and the Mac's are just 2 wire.

     

    Thanks So Much In Advance!!, Your All Great!

    MajorMacintosh

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