Can i use different looking sticks of 8gb ram?

[Oftenneedshelp]

Hey guys
I was looking to upgrade my ram from one 8gb stick to 2 8gb sticks. I took my ram out, and searched up the majority of the numbers, with kingston in front. KVR21N15S8/8 came back with results that had the same looking sticks. I ordered the ram. However, the ram has arrived and it looks different to my current stick. I can confirm it has the same voltage and speed (1.2v and 2133mhz) at 8gb each, I was wondering whether it would be ok to use together?
Thanks

 

[kanewolf]

It might work, it might not. There is no way to predict. Manufacturer's sell "matched sets" of RAM because they have tested the parts as a set and guarantee them to work as a set.