One more comment on this and then I'll stop poluting the What's Your Latest Purchase thread. Still no luck confirming dual or single rank. I made my way into the bowls of the TeamGroup website and found the RAM, even downloaded the related PDF for specs, and nothing there mentions the rank spec.
I did find one seller site, memoryc.com (never heard of it before) listing the 32GB kit (2x16GB) of the same RAM as "Dual Channel" in their description, so perhaps the increases the odds of the larger 64GB kit being dual rank, but I can't confirm it in anything official from the company.
So I'll have to wait and see what it ends up being when things are up and running.
Dual Channel vs Dual Rank. Not the same thing.
It'll be what it is when it arrives. Dual Rank is preferred if you're only running 2 sticks but there's not much you can do about it if you can't get the sticks.
When this first came out, a good portion of the 16 GB sticks were dual rank, but over time higher density mem chips came out and it was cheaper for the manufacturers to do them as single rank. I'm not sure if we're at that point with 32 GB sticks yet.