At website of gigabyte X470 Aorus are:
" Before update BIOS to F40, you have to install EC FW Update Tool (B19.0517.1) to avoid 4DIMM DDR compatibility on 3rd Gen AMD Ryzen™ CP"
Well I donwload the EC FW update Tool at Utility bay and start it.
I got a black screen and shutdown.
My bios back to F4 0_o
It was at F40 ( yes I updated to F40 without update the EC FW because this information didn´t was at site)
So.. Update to F31 and F40
But dont know if EC FW update worked.
How to know?