Leak on the Asus website confirms that AMD Ryzen supports DDR4 ECC
On the Asus website some time ago there was available information about the system Board PRIME X370-PRO. The description of this Board with the CPU socket AM4 is interesting in that it confirms the assumption that the AMD Ryzen supports DDR4 ECC. Now the page is removed, but still viewable in the Google cache.
We will remind, start of sales of the AMD Ryzen named on March 2.