iMac G4 memory issue

Discussion in 'PowerPC Macs' started by makleod, Apr 6, 2011.

  1. makleod macrumors newbie

    Aug 16, 2010
    I recently got an iMac G4 ( and I am attempting to upgrade the memory. The specs show that it takes 1 512 mb PC 133 SDRAM SODIMM and 1 512 mb PC 133 SDRAM DIMM. The computer originally came with 256 mb (2x128). I upgraded the SODIMM to 512 mb - no problem. However, I have gone through 2 RAM sticks ( and (, but they WILL NOT POST or show up in "About my Mac" or the system profiler. I am really confused as to what's going on because it recognizes the original 128 mb DIMM no problem. Is the RAM I am using incompatible? It doesn't seem to be as it's PC133 SDRAM DIMMs. Looking for any other iMac G4 owners who have some advice...
  2. 666sheep macrumors 68040


    Dec 7, 2009
    Golden rule: do not buy no name RAM. Most of it won't work.
    Well known brands like Crucial/Micron, Corsair, Kingston, Hynix, Samsung, Infineon etc. will work. RAM must be low density (ask seller before buying in case of any doubts).
  3. fhall1 macrumors 68040


    Dec 18, 2007
    (Central) NY State of mind
  4. makleod thread starter macrumors newbie

    Aug 16, 2010
    Yea, I figured I was going to get burned with cheap RAM, but had to try just in case it worked. Thanks! I'll order the WINTEC RAM and it should work.

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