I have had the MP since late 2008 and the OWC RAM has been in there since that time. All the slots are filled with 2GB sticks. Then a couple of months ago I had to move the MP to another room and within weeks a stick of RAM failed. Then a couple of weeks ago I moved back to the old office and ....another stick failed. Is this just coincidence? What's weird is that it is always the sticks at the very rear of the riser board. When you look in the RAM area, those sticks are not in direct airflow from the fans. Any thoughts on what is happening? I have tried re-seating the RAM several times and the contacts look fine.