Really weird memory issue with powermac g4

Discussion in 'PowerPC Macs' started by orangejedi, Feb 9, 2009.

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  1. orangejedi, Feb 9, 2009

    orangejedi macrumors newbie

    Joined:
    May 12, 2008
    #1
    Hi, I have an old 450mhz powermac g4 and about a billion old sticks of pc133 (and some pc100) ram.
    So I have 3 128mb PC133 memory sticks, and when i put each in the powermac individually (as the only mem stick in the computer), they work fine.
    However, if i put any more than one stick in the computer, it will turn on but not boot up or display anything.
    Wha???
    This computer is my "storage dump" and web server :(
    Could someone please help me fix it?
    thanks in advance!
     
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  2. SmurfBoxMasta, Feb 9, 2009

    SmurfBoxMasta macrumors 65816

    SmurfBoxMasta

    Joined:
    Nov 24, 2005
    Location:
    I'm only really here at night.
    #2
    Those old G4's could only read low-density ram.....ie the ones with dram chips on BOTH sides of the circuit boards, and they can NOT be mixed in with high-density sticks..ie the ones with dram chips only on 1 side of the board.....

    Also, some of those G4's were picky about mixed-speed ram too, so either use all PC-100 or all PC-133 just to be safe :p
     
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