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  1. #1


    Member Since
    May 20, 2006
    Posts
    41
    Specs:
    PowerMac G5 Dual 2.0Ghz, 250GB Hard Drive, 4GB RAM, GeForce FX5200, iPhone 3G 8GB
    Power Mac G4 RAM Issues
    I just want to make sure that I didn't get ripped off. I just bought a 128MB PC100 chip of RAM from someone and it is identical to the two I have that came factory loaded in my Powermac G4 AGP graphics. In my Powermac, I have two 128MB chips and they work fine. But when I added this third identical chip, I get a boot error when I power the system on. When I called the guy back, he said that these RAM chips only work in pairs. Now I've personally never experienced this issue with any PC100/133 RAM, but I just wanted to ask before I start pointing fingers. When I say this is identical, I mean it is the exact chip, company, everything. Thanks.

  2. #2


    Member Since
    Oct 27, 2005
    Posts
    4,702
    The following link tells you everything you need to know about upgrading the RAM in your G4:

    http://docs.info.apple.com/article.html?artnum=58426

    The computer comes from Apple with one DIMM slot populated with a 128 MB DIMM. Additional DIMMs can be installed in any order, in any size. There is no performance benefit to matching DIMM sizes or installing them in pairs.

  3. #3


    Member Since
    May 20, 2006
    Posts
    41
    Specs:
    PowerMac G5 Dual 2.0Ghz, 250GB Hard Drive, 4GB RAM, GeForce FX5200, iPhone 3G 8GB
    Thanks Martin. I think that article tells me that I was ripped off. I figured as much, but I just wanted to ask before I pointed fingers. Thanks for the info.

  4. #4


    Member Since
    Oct 27, 2005
    Posts
    4,702
    Yeah, although that RAM should work as it's acceptable for your G4, but it must meet these requirements:

    PC-100 Synchronous DRAM (SDRAM)
    3.3 volt
    64-bit wide, 168-pin module
    Maximum of 16 memory devices on the DIMM
    Unbuffered; do not use registered or buffered Synchronous DRAM (SDRAM)
    Maximum height of 2.0 inches.

  5. #5

    johntalin's Avatar
    Member Since
    Dec 29, 2006
    Location
    California, the golden state
    Posts
    1,177
    Specs:
    G4 AGP 400 MHz 1.34gb RAM
    Hi Pulse-8, I have the same Mac. Would this one work?

    http://www.amazon.com/PNY-512MB-PC13...5932991&sr=8-1

    or, any of these?

    http://www.amazon.com/s/ref=nb_ss_e/...2&Go.y=9&Go=Go
    "Do all the good you can... In all the ways you can... In all the places you can... At all the times you can... To all the people you can... As long as you ever can..." ~ Rules of Conduct

  6. #6

    johntalin's Avatar
    Member Since
    Dec 29, 2006
    Location
    California, the golden state
    Posts
    1,177
    Specs:
    G4 AGP 400 MHz 1.34gb RAM
    Never mind. I figured it out a while back.

    http://www.allmemoryupgrades.com/pc133sdram.html
    "Do all the good you can... In all the ways you can... In all the places you can... At all the times you can... To all the people you can... As long as you ever can..." ~ Rules of Conduct

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