Talk Tennis Guru
I think that best practices is to use matched sets in each channel. So if you get triple-channel memory, you should buy three of them at the time. If you have six-channel memory, you should buy six of the same thing at the same time.Ah, I thought you had 4+4+4 or 8+4, which I had talked about in the inital post.
All of the recommendations that I've seen are to use matched sets.
Of course I have seen mismatches on RAM sold to come up with odd configurations. The Mac Pro can be purchased with 4x8=32 but it has six-channel memory - it would be better to order them with the same but I guess that's their base model. All of the other options have six or twelve sticks.