Power Mac G4 Sawtooth 7455 upgrade

Discussion in 'PowerPC Macs' started by Gionnimata, Apr 27, 2012.

  1. Gionnimata macrumors newbie

    Apr 26, 2012
    Since 1999 I have a PM G4 AGP Graphics 'Sawtooth', 400Mhz PowerPC 7400, 1 GB RAM, Mac OS 9.2.2. Recently I updated with a NVIDIA GeForce 6200A 256MB AGP card, Sonnet SATA and SSD 128 GB Verbatim, Mac OS X 10.4.11. I also bought on eBay an Apple PowerPC 7455 CPU dual 1Ghz. Can someone help me and tell me if it's possible to install the CPU on my G4 and how to do it.
  2. ThunderSnake macrumors 6502

    Jul 23, 2010
    Is your dual 1GHz module from a Quicksilver or an MDD? If MDD, no. If Quicksilver, see this thread.

    Also some early Sawtooth motherboards do not support dual CPU daughtercards. Uni-N 7 or later is required to run dual CPU's in a Sawtooth.
  3. Gionnimata, Apr 28, 2012
    Last edited: Apr 28, 2012

    Gionnimata thread starter macrumors newbie

    Apr 26, 2012
    Thanks for the help. This is the CPU
    So I guess it will not work.
    I will try another CPU and see if you also change the power supply.
    Wanting to keep the old heatsink, how to solve the contact with the two CPUs. I had added two sections of aluminum coated with graphite. Should I use thermal paste? Just the additional fan?
  4. archtopshop macrumors regular

    Dec 13, 2011
    Before you purchase another Dual CPU board, read the page referenced below, and download the small utility located there to check your motherboard for UNI-N7 chipset.


    Hope this helps.
  5. Gionnimata thread starter macrumors newbie

    Apr 26, 2012
    Thank you for your help. The serial number of my G4: CK94269KHLK and manufacturing date is October 1999. I'll try a single Sonnet CPU card maybe to 1.4 or 1.8 Ghz. Too bad because I had already removed the IDE connection. 7455 I will keep as a souvenir.

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