Oh no well at least we know it's not reliable. I'll remove that section from the write up for now.
Out of interest, do you have access to a Win install and AIDA64 on that same i7 box? I would be interested to see if AIDA64 thinks it's enabled.
EDIT: I've just put a comment at the top of the ECC section. Maybe if we discover something else that is similar, I won't have to rewrite that section