TL;DR: I was experiencing choppy MS Teams video calls and looking at Task Manager showed that it is the Intel _GPU_ that is saturated.
How to fix? Add a second same size memory module (SO-DIMM) to enable dual-channel memory operation for your integrated GPU, especially if you also have a 4k display (will help your CPU as well in a few applications).
Before:
After:
(look at the memory read speed almost doubling, but the latency also _decrease_ with double the RAM!)
