What is the difference between RAM boards?

Question

Iron

Hello. I'm building a PC, I came across a RAM with the same characteristics, but at a different price. I went to the manufacturer's website and there it differs only: the Organization column in one 512 * 8 in another 1024 * 8.
Link:
www.goodram.com/product/ram-modules/goodram-ddr4
Models you are interested in: GR2133D464L15S/8G and GR2133D464L15/8G.
What is the actual difference and what is this indicator?

Answer 1

it differs only: the Organization column in one 512 * 8 in the other 1024 * 8

remember the math and by simple calculations we get that one bar is 4 GB, and the second is 8 GB.
the same is written right there on the page:

Capacity: 4GB and 8GB for a single module
8GB 2x4GB and 2x8GB 16GB Kits

GR2133D464L15S/8G - one 8GB module
GR2133D464L15/8G - kit (kit) of 2 x 4GB modules