Well well. Look what I found.
Two are Micron. One is Samsung. And the other is Hynix.
The stick that takes slightly longer to light up and the one that I got back from RMA is the Samsung memory.
So I have 4 diff memory modules with memory from 3 diff manufacturers.
Is this a potential issue?
Will post pics now Just wanted to remove the one stick and run HWIfno again to check I had the memory right for that stick.
It "shouldn't" be an issue, but evidently it can be, hence why kit ram became a thing after ddr2. Try run it at jedec speeds, so turn off xmp and see if you get any of the previously mentioned issues.