On Fri, 15 Jan 2021 21:55:18 GMT, Harry Bloomfield, Esq.
wrote:

Acer ES1-521 with 8Gb RAM, AMD A6-6310 CPU, Radeon R4 Graphics1Tb HDD.
It seems to have one memory slot occupied, one empty. Running Win10
64bit.

Yes...installing another similar spec SODIMM will enable dual channel
mode. You can never have enough RAM.