I read about the meaning of 4Rx4 on memory label

4R -> quad rank -> data width of memory module is 64 * 4 = 256 bits

x4 -> data width of on DRAM chip on memory module

-> 256 / 4 = 64 DRAM chips

But on product image, I see 16 DRAM chips

I don't know why. Do you have any ideas ?

Thank you in advance.

2

1 Answer

You see 16 total because what you see is 4 sets of 4. It stacks 4 chips per package.

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