G5 sometimes reads 6.5 gigs RAM, sometimes 5.5 gigs RAM: Can Shutdown!

Discussion in 'PowerPC Macs' started by DetroitMacJack, May 1, 2010.

  1. DetroitMacJack macrumors newbie

    Joined:
    May 1, 2010
    #1
    Hello,
    I installed new RAM. BUT, there is some trouble that I hope you can help with:

    1. My G5 sometimes reads 6.5 gigs of RAM, and sometimes 5.5 gigs of
    RAM. NOTE: Slots DIMM6/J43 & DIMM6/J44 vary in gig size (see at bottom)

    2. I can't shutdown. The icons disappear from screen, but, fans
    rev-up, and screen background remains, but, computer won't shutdown.
    I have to shutdown with power button.

    3. I've Reset PRAM, unplugged power and disconnected all plug-ins,
    and then started again. No change.

    4. I've done disc repair off of OS X disc. No change.

    I've included the MEMORY status from "About this MAC" with the two
    different readings (DIMM6/J43 & DIMM6/J44). I've just received a new Hard Drive that I want to install, but, am waiting to resolve this problem before I install HD). I don't know if some of the RAM is bad. The original RAM is in the first two slots. The next two slots have 2x1 gig RAMs I had installed
    when I bought the computer new. The remaining four slots have the
    new 1x4 gig RAMs I bought last week. Please take a look and tell me what you think.

    DIMM0/J11:

    Size: 256 MB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM1/J12:

    Size: 256 MB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM2/J13:

    Size: 1 GB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM3/J14:

    Size: 1 GB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM4/J41:

    Size: 1 GB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM5/J42:

    Size: 1 GB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM6/J43:

    Size: 512 MB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM7/J44:

    Size: 512 MB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM6/J43:

    Size: 1 GB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK

    DIMM7/J44:

    Size: 1 GB
    Type: DDR SDRAM
    Speed: PC3200U-30330
    Status: OK
     
  2. Wonderl33t macrumors newbie

    Joined:
    Jul 24, 2002
    Location:
    Fresno, CA
    #2
    bad RAM happens. Since you installed 4 at once, I would recommend trying them 2 at a time (because you have to install in pairs). And see if your computer still acts up.

    Basically, try to isolate the bad RAM.

    Sorry but I have to ask, did you do anything to your computer lately besides adding RAM?
     
  3. DetroitMacJack thread starter macrumors newbie

    Joined:
    May 1, 2010
    #3
    Thanks for the quick reply,

    No, just installed RAM. I just received a new HD in the post, but, do you think I should resolve the shutdown problem before I install the new HD?

    Update, now for some reason, "About This MAC" reads correctly for all RAM. However, still won't shutdown. It's very strange though: If I run the computer for a short time, it will shutdown normally. But, if I use the computer for 3-4 hours, it won't shut down. Then, I shutdown with the power button . . . then, I start it back up again, and it shuts down normally. So strange.

    Now that the RAMs all read correctly do you still think they could be bad?

    Jack
     
  4. DetroitMacJack thread starter macrumors newbie

    Joined:
    May 1, 2010
    #4
    New Update:

    Wonder,

    I followed your advice (thanks!), and low and behold, you were correct, "bad RAM happens". I removed the bad single/pair, and now computer shuts down normally. I bought the RAM at a premium price from MacRamDirect.com, and they have been extremely helpful and responsive. I'm hoping they'll reimburse return shipping (waiting to hear). Thanks for your help!!

    Thanks, Jack
     

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