See this FAQ: https://forum-en.msi.com/faq/article/amd64-and-memory-explained
If you have any further questions, please start your own new topic.
Stu, I think he was asking for an opinion about whether performance might not be better at 8GB and 4 sticks--And NOT asking if he could clock 4 sticks at 1066.
There are many of us who wade through the info w/o having terms and specs burned into our brains, yet--Trying to see what we can do with our options.
--See, there is a middle ground of people who are interested and capable of tweaking their systems to suit their wants. Forums should actually be reaching-out to such people, not sniping them. In fact, if the experts were more genius, they would address issues in a manner that answered potential questions and problems for newbs and sophomores--That would prevent most of the seemingly similar questions.
However, if respondents desires are to be at the top of their own little snipey-nerd-mound, they will always succeed--And since they never look downward, they won't notice that they are, at the same time, on the bottom of it--It being a mound of one.
You want to know why this thread is a pain to sophomores? 1) Second entry on thread causes false hope, 2) Not knowing how single/dual channel relates to SR, DR, QR.
His was a valid question for addressing on this thread. If you guys don't like helping people out, then don't pretend to. If MSI had (and or AMD) had definitive specs listed in an organized and useful manner, we wouldn't need to ask tech questions of forums. Being hammered by respondents of forums is a poor substitute for what is reasonably expected. Yes, there are trolls, but a 10 word opinion of which you thought might work better is pretty easy.
Now, what is someone's future option to not be treated badly and still get their tech questions answered? 3 words, 3 letters each.