Question about RAM

[Cepheid]

Hi LTT,

I got a new computer a few months ago (Rtx 2060, 8700k and 1 Stick of 16gb Ram) And I realized that for certain games having dual channel RAM can make a considerable difference. I want to upgrade my RAM to be dual channel but I'm not sure the best way to go about it. The Stick I have installed right now is a G.Skill Ripjaws "F4-3000C16D." I was looking for an identical stick online but the only one I could find was sold out. So my question is, can I get another 16GB stick with a slightly different model and different speed (I was looking at this: https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232090), or would it be best to just get a new set all together, maybe 2x8GB sticks? If I were to go with this second option does anyone have any recommended stores/websites I can sell my current 16gb stick at? 

[Spakes]

RAM sticks don't need to have the same serial number on them. CAS latency, manufacturer (of both RAM stick and memory dies), line-up, amount of RAM and speed should be enough for ideal pair.

And yes, this model is fine. Your PC will use lower values of speed and higher timings of two.