Going by the 12GB figure, I guess he's running 6x2GB DIMMs in a Core i7 box and is pushing his memory controller slightly over its limits.
I used to run 6x2GB at 1333MHz with an i7 920. I swapped the CPU with one that could properly drive my ECC memory (W3520), and quickly found my choices were either an unusable system, 3x2GB at 1333, or 6*2GB at 800.
I used to run 6x2GB at 1333MHz with an i7 920. I swapped the CPU with one that could properly drive my ECC memory (W3520), and quickly found my choices were either an unusable system, 3x2GB at 1333, or 6*2GB at 800.