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The other arguments seem excessively pedantic... memory speed hasn't been a bottle neck for years, the bottlenecks are predominantly storage and network, and then the number of physical cores. You would not notice mild memory differences, only big jumps in total memory volume.
Fair point, a little more reading about and I was getting that feeling!
Yes I did think about the upgrade thing, given it's not my money paying for it I think it's easier to get it over the line now with a cheaper price. Apparently we're moving everything to the cloud in a few years. 64Gb serves me fine for now.
Polygon
You're into such minutaie that it's all irrelevant.
The CPU has 2 memory channels, meaning the 4 DIMMs work in pairs for the CPU. If you only have 2 DIMMs to put into the machine then they need to go into specific DIMM slots such that each CPU channel gets 1 DIMM. If you have 4 DIMMs then 2 supply the 2 CPU memory channels.
But there is no optimal here... it's all good enough.
The more pressing question is whether you want to purchase 4 x 16GB or 2 x 32GB. The latter gives you an upgrade path in future for a small premium now, the former is maxing out the upgrade path for those components... slightly cheaper now but way more expensive to change in future.
The other arguments seem excessively pedantic... memory speed hasn't been a bottle neck for years, the bottlenecks are predominantly storage and network, and then the number of physical cores. You would not notice mild memory differences, only big jumps in total memory volume.
Which is to say that the biggest perfomances differences come from:
Exact configuration of RAM and RAM timings and speed isn't as noticeable as anything above, perhaps a +/- 1% difference that you couldn't perceive unless you're running a system at full capacity for a sustained period of time which no-one is (even tasks people think of like that don't use all the things all the time).