Roommate's PC has 4 GB - yes FOUR - of 2133Mhz DRAM. Should I buy more of the same, get him up to, say, 20 with a 16GB pair?

I have a Corsair DDR4 2x8GB kit which is CMW16GX4M2D3600C18. 16GB is too low for modern day applications, so I want to upgrade to 32 GB. This RAM was bought a long time ago, but is still available for ...

The command wmic memorychip get speed is used to identify the RAM speed. One can do the same from the Task Manager. However, for some users, the speed is not matching. If you get the wrong RAM Speed ...