Hello Fernando, recently I visited the X99 ECC support and noticed that Lost_N_Bios had a conversation with a user by the name e97 a few year ago and unfortunately ,due to factory request, the post that contained the Bios that could enable ECC memory was erased.
Lost_N_Bios said that he had a copy in case anyone need it. (X99 ECC support - #65 by Lost_N_BIOS)
Sadly, he is no longer active but I was wondering if you know way that i can contact him?