RAM module 'error' showing on About my Mac

Discussion in 'Mac Pro' started by soos, Apr 26, 2015.

  1. soos macrumors newbie

    Oct 25, 2008
    Does anyone know what may be going on. I have 10GB (4x 2GB and 2x 1GB) and since updating to Yosemite I intermittently see 'error' on the same 2GB module in 'About my Mac'.

    However I have not noticed any unusual issues with my Mac Pro 3,1. I just see this 'error' intermittently when I check in 'About my Mac'. On other days it shows that all the modules are ok.

    I have done Memtest in single user mode and it's all fine.

    Do you think the memory module is faulty or just a Yosemite issue? I have found another thread with this issue but it's not really informative
  2. IowaLynn macrumors 65816


    Feb 22, 2015
    Memtest generally does not find errors with FB-DIMMs or ECC memory.

    FB-DIMMs fail usually from heat and stress, going hot-cool-hot again over time.

    Ideal in a 2008 is to fill all 8 DIMM slots. Even if 667MHz (tend to be cheaper and run cool). You can find Mac Pro FB-DIMMs on ebay or Amazon, and Amazon have been excellent quality - mine stay a nice 59*C.

    Errors may be correctable, but you could result in "garbage out" too.
  3. soos thread starter macrumors newbie

    Oct 25, 2008

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