Matching Ram?

[SgtSparkles]

Our point of sales software at work operates from a bigger desktop machine "server" ,It's not a server but it does serve as the parent for data of this particular type of pos software. Anywho, that machine and the other machines talk to it and operate together. The machines are just regular enterprise desktops running windows 8 or 10 if they're newer laptops for service techs and the software is pretty bandwidth and RAM hungry. Yesterday I upgraded our router to one with way more cache and bandwidth and of course it's much better. My question is that the desktops each have one dim of 4gb ddr3 with an empty slot and the "server" machine has 2 dims of 4gb ddr3 with 2 empty slots. I'm looking to plug those other slots with matching ram just to up the attention span of thes machines. I've attached pictures of the existing dims that i need to purchase 2 matching sticks for each of. My question is are the links I'm posting here matched enough or do i have to be 110% matched on these to insure function? I think these should be close enough, right?

 

Link for the samsung dim match?

https://www.amazon.com/Samsung-PC3-12800U-1600MHz-Desktop-M378B5173DB0-CK0/dp/B0124VLXQW/ref=pd_lpo_sbs_147_t_2?_encoding=UTF8&psc=1&refRID=8CE42W8RAWFRA8ZMZDBN

 

Link for the Micron dim match?

https://www.amazon.com/Micron-PC3-12800U-MT8JTF51264AZ-1G6E1-Desktop-Memory/dp/B011STAHN6/ref=asc_df_B011STAHN6/?tag=hyprod-20&linkCode=df0&hvadid=309833041189&hvpos=1o1&hvnetw=g&hvrand=3544733967947613546&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9021400&hvtargid=pla-623527896407&psc=1

 

[SgtSparkles]

50 minutes ago, yaboistar said:

if the model numbers are the same they should work together. as a sanity check make sure the speed and timings are the same, but those are usually denoted by the model number anyway

I Posted links to matches on amazon but especially the samsung one the model number is the same except for like 2 letters at the suffix. I'm just not sure if they should match up or not