I have a laptop with a single stick of RAM, with one slot free. Here are the specs of the existing RAM stick: SODIMM DDR4 2400, Single Rank, None-Ecc.
I was thinking of the Crucial CT8G4SFS824A. Exactly the same specs as mine, and I used the compatibility checker on their website. It said that this would work.
My only question is, when I used the automatic check tool on the website, it recommended to me the dual-rank version of this same stick. After doing some research, apparently both DR and SR sticks are cross-compatible.
I just wanted to make sure before buying, because even though manually checking the single-rank stick with Crucial's utility said it was compatible, the tool recommended the dual-rank version.