A question about RAM.

Pidvalka Raguckis

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Aug 5, 2015
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In the internet shop I saw a RAM product it's written that it's 8 G, the complect contains 2 of those small plates.
Does that mean that I will get 2x8Gb making it a total of 16 GB?
Right now my pc has 1x 8gb card.
I don't remember the company that produced it. But I think if I will get another 8 gb card which company is not the same it's not going to work. Am I right?