I tried some configs on my BIOS and managed to boot with my 2 sticks of 8Gb each.
What I did was increase the memory voltage to 1.650 and increase the System Agent
Voltage to 1.000. After that, my two sticks of 8Gb worked fine!
If I let the BIOS manage the default profile or even the XMP profile, I get error in the post. But with that config, everuthing went fine!
I guess that in dual channel the voltage drops a little and the memory don't work. Well, I don't know much about memory, but this is what I can imagine...
Now I changed my 16 Gb kit for the 32 Gb kit and worked fine with that config.
I hope that this could help someone else!