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  1. #1


    Member Since
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    Power Mac G4 Upgrade
    i am getting a power mac g4 sawtooth 400mhz and found a 1.8ghz processor for a pretty decent price and was wondering if it would be compatible

  2. #2

    harryb2448's Avatar
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    G'ay and welcome to the forums.

    Only if it is an after market CPU update from Maxpower, OWC and similar companies so we need more information. If it is G5 CPU no way period. Here is a link to OWC CPU upgrade page:-

    http://eshop.macsales.com/search/G4+CPU+upgrade

  3. #3


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    It's says it's a newertech G4 CPU upgrade 1.8 ghz. I just didn't know if it would work or not on a sawtooth because I thought it could be too big of a jump

  4. #4

    harryb2448's Avatar
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    No it will be just fine but depending on what OS the G4 has been using you may have to update the Firmware to version 4.2.8. Is there any operating system on the machine and if so is it OS X of any description? To check this out with an OS installed select Anout this Mac from the apple icon in the menu bar, select More Info and the first window should show the Boot ROM version. This needs to be 4.2.8 and probably f1 after that.

  5. #5


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    will this one work or not
    Apple PowerMac 1.6GHz Processor CPU T6548 630-6549 -1C - eBay (item 220533832189 end time Jan-07-10 07:06:36 PST)


    i checked the computer im getting and it says it is in the M5183 family.i dont know if that helps you at all.
    also thank you so much for helping me.im new to macs

  6. #6

    harryb2448's Avatar
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    Look very much like a G5 CPU so the answer would be no. The only processors that will fit the Sawtooth are 400MHz, 45)MHz and 500MHz CPU's from Sawtooth and Gigabit Ethernet computers. None of the 133MHz system, bus speed from later machines, or faster, or G5's will work hence checking out the link from OWC.

    When you check out the price of CPU upgrades at $400-$500 you will get a much faster dual processor G5 for that much and that is the problem with CPU upgrades, cost has priced them out of the market place. Did use a 1.4GHz CPU upgrade from OWC some five years ago and the unit was okay, just, for running Leopard.

  7. #7

    dtravis7's Avatar
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    The newertech G4 CPU would probably work. Do you have a URL to it? I know they made upgrade CPU's for the Sawtooth.

  8. #8

    harryb2448's Avatar
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    Here is the CPU upgrade from my previous post with the link. Note the price it is just not worth the money now as you can buy a newer, faster G5 for less:-

    http://eshop.macsales.com/item/Newer...y/MAXG47D1600/

  9. #9


    Member Since
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    this is the link for the cpu upgrade i was talking about

    1.8GHz Newertech 7448 G4 CPU upgrade for Apple Powermac - eBay (item 170427716136 end time Jan-10-10 17:35:50 PST)

    i also found this one that i think would work.its not as fast but it is still better

    http://cgi.ebay.com/APPLE-G4-933MHZ-...item5637b3fff5

  10. #10

    harryb2448's Avatar
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    That is the one, the first. The 933MHz will not work as it is for a Quicksilver and is the actual board. Here is a link to installing and setting the jumpers on the upgrade:-

    www.newertech.com/downloads/nwtmang4max.pdfere

  11. #11

    dtravis7's Avatar
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    Like Harry stated that Newertech will work. There are 5 days left though and it might go quite high in price at the end. Do watch it though.

  12. #12

    harryb2448's Avatar
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    Yep and expect it to get too $200-$300. Still too dear as the G4 will still be stuck with the 100MHz system bus speed, the 128GB HDD limitation and a 2X AGP slot.

  13. #13


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    well i cant really do much now.i received the computer but i got the flashing question mark even though in the description it said it would have tiger on it and be working

  14. #14

    harryb2448's Avatar
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    Imac 27" Retina 5K, 512GB flash memory, 3.3GHz, 16GB memory, macOS Sierra beta.
    Did you get the Tiger install disc with the machine? You need to boot from the install DVD and run Repair Disk. Can also be a sign of a failed hard drive.

  15. #15


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    No they said they would install then send computer without the disks

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