Did I mention that MOBO is beeping on

Did I mention that MOBO is beeping on memory? Well, it does!
This is general question:
If I have memory supply ok, how to test if something else is problem or problem is with memory on some other way then with its supply?
What is part of north bridge in memory inicialisation? Who goes first?
I read that some people solved this kind of problems by heating North. In this case, that method didn`t help.
Where to read next?
Is there any benefit of changing MIO when this kind of mailfunction( E0 + beeping on RAM) is present?

EliteGroup 865PE-A7 V:1.0
  • Did I mention that MOBO is beeping on