In our system every node gets inlet water at the same temperature via parallel piping, but when it’s in node, it goes through processors first, then RAM, then PCIe and disks. Delta T between two sockets is 5 degrees C, and the delta T between input and output is around 15-18 C depending on load.
First, thanks for sharing these details, I find them fascinating because they are not so common to be read or heard about.
> Delta T between two sockets is 5 degrees C
And secondly, ~5-10 degrees is what I see on my dual-socket workstation, and have been wondering about this delta ever since the first day I started monitoring the temperatures. At first, I thought that the heat sink wasn't installed properly but after reinstalling it the delta remained. Since I didn't notice any CPU throttling or whatsoever I figured it's "normal" and ignored it.
Hey, no worries. Using one is equally fascinating as much as reading about it. It feels like a space shuttle, so different, yet so enjoyable.
I mean, water travels from one socket to another, so one processor adds heat equal to 5 degrees C under nominal load. The second socket doesn’t complain much, but this is enormous amounts of heat transferred in a such quick pace.
