[genewitch]

I had an HP from 2010 that supported 1.5TB of ram with 40 cores, but it was 4U. I'm not sure what the height has to do with memory other than a 1U doesn't have the luxury of the backplane(s) being vertical or otherwise above the motherboard, so maybe it's limited space?

[dijit]

Theres different classes of servers, the 4U ones are pretty much as powerful as it gets, many sockets (usually 4) and a huge fabric.

1Us are extremely commodity, basically as “low end” as it gets, so I like to use them as if they are a baseline.

A 1U that can take 1.5TiB of ram might be part of the same series of machines that might have a 4U machine that could do 10TiB. But those are hugely expensive. Both to buy and to run