Results 1 to 6 of 6
  1. #1
    My iMac G3 RAM upgrade not working
    willwinuk's Avatar
    Member Since
    May 22, 2009
    Posts
    35
    Specs:
    iMac 27" 3.4 GHz i7, AMD Radeon HD 6970M 2048 MB, 8 GB Ram running Mac OS X Lion 10.7
    Angry My iMac G3 RAM upgrade not working
    Hi,
    I have just tried upgrading my Flower Power 500 MHz iMac G3 from 256 mb ram to 512 mb. But it just makes a ding and does not boot up. the ram I got is 512MB PC133 RAM from PC memory 512MB PC133 RAM (major brand)- microdirect.co.uk
    I have tried with just it in only and it with a 128 mb stick.
    The only thing I can see is that it is double sided, and the sticks that were in it are single sided (does that matter?).

    Any Ideas please?

  2. #2
    My iMac G3 RAM upgrade not working
    kahlil88's Avatar
    Member Since
    Jan 29, 2008
    Location
    Mendocino, CA
    Posts
    680
    Specs:
    17" MacBook Pro A1151 2.16 GHz
    It's possible the RAM is a higher density than your iMac will support, or maybe has the wrong CAS latency. But try re-seating it a few times and make sure there isn't dust buildup or anything in the slots.
    There is no system but GNU and Linux is one of its kernels.
    Join the FSF as an Associate Member!


  3. #3
    My iMac G3 RAM upgrade not working
    willwinuk's Avatar
    Member Since
    May 22, 2009
    Posts
    35
    Specs:
    iMac 27" 3.4 GHz i7, AMD Radeon HD 6970M 2048 MB, 8 GB Ram running Mac OS X Lion 10.7
    Question
    How do I check its density and CAS latency?

  4. #4
    My iMac G3 RAM upgrade not working
    hughvane's Avatar
    Member Since
    May 18, 2008
    Location
    Banks Peninsula, New Zealand
    Posts
    3,296
    Specs:
    MacMini 2.4, 8 Gb, OS 10.10 and 10.6; MacBook 2.4, 4 Gb, OS 10.6.8
    Your web link doesn't help unfortunately, and from the price you paid I'd suggest to you that the RAM you've bought is unsuitable for your Mac. Sure, some generic (major brand) PC memory will work in a Mac, but you're far better off sourcing Mac-specific RAM. I'm almost sure the RAM for your model of iMac should be low density. See the specs at lowendmac.com 500 MHz iMac (Mid 2001) Specs or Apple iMac (Early 2001): Technical Specifications. [Strangely, every site about the G3 iMac I've checked does not mention RAM density, or single-sided or double-sided.]

    OWC is still, in the opinion of many, to be the best place to shop for Mac-friendly components. Is there a problem for you importing RAM into the UK?

    Once again, here are the details of your iMac but it doesn't provide answers to your questions iMac (Early 2001 at OtherWorldComputing.com)
    and 512MB PC100 CL2 168 Pin SDRam 2-2-2 fo... (OWC100SD512328) at OWC.

    There are ways to find the nearest Mac shop with a Google search using Mac UK, eg. Memory Apple Mac Parts and Repairs from VIS Ltd

  5. #5
    My iMac G3 RAM upgrade not working
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,041
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    This is the specifications of the memory you need:-

    Memory for Apple iMac G3 350MHz, 400MHz, 500MHz, 600MHz, and 700MHz models at OtherWorldComputing.com

    Most PCs use cheaper high density memory and Apple Macs, particularly G3 and G4's must use low density modules. No doubt the ones you purchased are high density and either the machine cannot boot from it, or it will cause what ios known as a kernel panic attack.

    Suggest you buy memory from an Apple source, not Apple branded which is heavy man heavy.

    OWC are Mac specialists who have lifetime warranty on memory and are the cheapest, even for us down under.

    Also this might clear things up a little about high and low density memory:-

    eBay Guides - Myth Low Density vs High Density memory modules

  6. #6
    My iMac G3 RAM upgrade not working

    Member Since
    Apr 27, 2005
    Location
    Leamington Spa
    Posts
    135
    Specs:
    13.3 MacBook Air 1.7 i5 - also, Mac Mini and dead 12in iBook G4 (RIP)
    I bought a G4 iBook and a Mac Mini and upgraded the memory of both with Crucial RAM...

    on their UK website, they have a gizmo that checks your machine, sees what you have and suggests how to boost the RAM...

    RAM Memory Upgrade: Dell, Mac, Apple, HP, Compaq. USB drives, flash cards, SSD at Crucial.com

    Check them out... they're fast and guaranteed to work... not as cheap as PC memory but cheaper than Apple memory...

    I can highly recommend them...
    Where's the right-click button?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. iMac -- RAM Upgrade
    By Snimo in forum Apple Desktops
    Replies: 18
    Last Post: 12-08-2012, 03:40 AM
  2. Power on button not working after attempt to upgrade RAM
    By lajgaard in forum Apple Notebooks
    Replies: 2
    Last Post: 07-31-2012, 04:18 PM
  3. iMac RAM Upgrade
    By fearlessfreap24 in forum Apple Desktops
    Replies: 3
    Last Post: 03-01-2009, 12:42 PM
  4. Upgrade from 2x1gb to 2x2gb RAM not working
    By kylelamb75 in forum Apple Notebooks
    Replies: 12
    Last Post: 05-19-2008, 01:26 AM
  5. RAM upgrade for new iMac
    By pix in forum Apple Desktops
    Replies: 4
    Last Post: 08-20-2007, 07:38 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •