4 GB RAM limit

[fire219]

So, is that;

 - 4GB per channel?
 - Or 4GB per rank, per channel?
 - Or 4GB total over both channels, regardless of the number of ranks?

Oh, well. At present, we get 4GB and it's probable that's the real limit. It's just that I wish vendors were more clear in their specifications.
If it trully is 4GB, I'd have written it different with 4GB limit on it's own bullet point line.

The answer is "yes to all of the above". It can support up to 4GB in single channel or dual channel, one or two ranks in either. But the absolute hard limit, regardless of how it is configured, is 4GB. 

I agree that it worded awkwardly, but all that really matters here is "total[ly] 4GB max address space".