I always thought the chips on the RAM stick would do one-bit error correction transparently and just fail to correct two-bit errors. But, it appears that the mo

I always thought the chips on the RAM stick would do one-bit error correction transparently and just fail to correct two-bit errors. But, it appears that the motherboard has to support it and you might need to enable it. There's an overview at http://en.wikipedia.org/wiki/ECC_memory#Pros_and_cons_of_ECC http://en.wikipedia.org/wiki/ECC_memory#Pros_and_cons_of_ECC Thank you for the question, I think I learned something today. I hope someone who knows better comes along, I'd be interested in knowing more.