Second FB-DIMM module died this year !

Discussion in 'Mac Pro' started by Spacedust, Nov 3, 2011.

  1. Spacedust macrumors 6502a

    May 24, 2009
    I've got 8x Micron 4GB DDR2 FB-DIMM 800 MHz sticks since January 2010.

    In April 2011 one of modules failed. I've replaced it with Hynix module.

    Today another one failed. Why is this happening ?

    Poor cooling ? I use sticks with small heatsinks, but I've added a small Zalman heatsink on a core of each module to keep them a little bit more cooler.

    I'm replacing the broken module with Kingston module.
  2. thekev macrumors 604


    Aug 5, 2010
  3. longmover macrumors member

    Apr 24, 2006
    Wales, UK
    Crucial replaced mine under lifetime warranty but that's not going to help you I guess. May be worth checking the airflow and making sure there's not a load of dust stopping the air getting to your ram (there was craploads in mine!)
  4. Spacedust thread starter macrumors 6502a

    May 24, 2009
    I've bought them on eBay. Current temps are:

    63, 66, 73, 67, 74, 66 Celsius grade (one is removed, one is invisible due to lack of a pair).

    The first one died because I wanted to install large heatsinks from my old Micron sticks, but I was unable to do this because it's all glued. So warranty was void (broken sticker).

    The second one is in perfect visual condition.

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