I just purchased an ASUS P9X79 WS with 2 4x4 kit for a total of 32GB but the system registers only 24GB. I have tested all of the memory sticks one at a time in memory slot D1 and they all work, it seems that channel B’s neither slots register the ram. I have this problem with another ASUS motherboard I purchased a few months ago; again channel B does register the ram. Is there something that I am doing?
I think, I may be on to something, posting the original question made me realize that I have tested all the variables between the two systems but not the constants. I will post soon with more detail about both motherboards and all of the components, their brands and model numbers as well as the result of the tests.