Potentially faulty RAM upgrade

Discussion in 'iMac' started by IMJ, Jun 23, 2011.

  1. IMJ macrumors newbie

    Joined:
    Jun 13, 2011
    #1
    I've just purchased a 27" i7 iMac along with an extra 8GB of RAM from Crucial. Everything works perfectly in OS X, but I have been having a few issues with Windows 7 64-bit on Bootcamp.

    To begin with, the Windows installation process was failing during the "Expanding Files" phase - after some Google searching I found that that a potential fix was to remove extra RAM. I removed the extra 8GB and then Windows installed properly.

    I then re-inserted the RAM and to begin with everything was fine in Windows - downloaded and installed all the updates, installed Chrome, web browsing okay. However, I then tried installing two completely different pieces of software (one from a CD, one from a downloaded file, both of which I've used before) and both installations failed with a Cyclic Redundancy Check error - which generally points to faulty RAM.

    I ran the extended Apple Hardware Test from the OS X install disc and no problems were found. And as I say, OS X has been perfectly fine, the only problems have been with Windows.

    Before I remove the extra RAM and send it back to Crucial, I'd like to check: Could the arrangement of RAM modules in the 4 slots make any difference to Windows? At the moment I have the original 2GB sticks in the first two slots and the 4GB sticks in the second slots. If I reversed them, could this make any difference, or is the RAM just faulty?

    Thanks in advance, and apologies for the long post!
     
  2. majkom macrumors 65816

    Joined:
    May 3, 2011
    #2
    Hi, not sure this will help you, but: i have bought imac 21,5 with 2x2 gigs end extended by another 2x2 gigs - i had several os X crashes, so i sent back those 2 modules i bought and get new ones, but situation repeated... solution proposed by my reseller - we have changed all 4 modules (original from apple and those bought) for Iceberg modules - and it seems it works flawlessly now...
     

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