If you affirm that without probe it doesn't have any value to me... There's lot of unbuffered boards labelled as non-ECC that supports correctly them (and activated). The option appeared in another similar models of Gigabyte when you just plug ECC unbuffered/unregistered dimms on it (I tried that in past).
We all know that the 990FX/990X of ASUS, Gigabyte's and the ASRock Fatal1ty Pro supports ECC...
Would be nice to check the ASRock 990fx extreme6 and ASRock 990fx Fatal1ty Killer too
Bump!