So I got myself a new setup, the foundation for it is a:
Ryzen 3700x on a Asus x570 Prime Pro, with 16gb of RAM HX430C15PB3/8. It works fine in Single channel, I can post and I can work with it no problem...
But what I want is a Dual channel memory so... Upon assembly I installed in MB A2* and B2* ( as MB manufacturer says ) and I got a yellow DRAM light check and FAILED post.
Then I installed in A2* and A1... and POST ok
Now I needed a new set of memory so I got a HX430C15PB3K2/16. ( At the time I was sure that It might be a compatibility thing).
The new set of RAM came tried and same happen.
Thankfully I contacted the retailer, I got the ram back to the warehouse they tried it and it works in Dual channel and it posts...
Now I will have my mobo tested, in which I hope it will be where the issue rest. Is it possible this might be a CPU issue? I mean everything works fine, I do my rendering ok.