Ah. Per CPU. I thought 4 channels meant 4 DIMMs. But the rule is "one DIMM channel, per CPU"? So in this case, the CPU has 4 channels x 2 CPUs = 8 DIMMs?

Any chance I could have known your answer from the numbers in the images I posted? What would have told me what you summarized? Or was the info from CPU-Z not sufficient to make a decision?