I learned a few things about RAM today. Things began with the realisation that a CPU can read 32GB of RAM (e.g. all of it) in about 10 seconds. That surprised me at first, and then I thought about it (for the first time ever, not usually a big fan of thinking, can lead to discomfort).
Then I learned that DDR4 has a 64-bit data bus whereas DDR5 has a 128-bit data bus.
And then I learned that today’s SDRAM used to be asynchronous DRAM.