Is a SSD memory card for PC with for example 2Tb capacity as fast as one with 1Tb when they have the same reading and writing speed in their specs?

Question

I don´t know anything about Pc building, and want to buy one. This is a question that came to my mind when doing my research. I think ultimately this comes down to how storage media/storagedevice(s) searches for information on itself. If it´s more of a archiv where everything is labeled and easy to find, or if there are many (example: a hundret) drawers and they are opened till the information is found.

Example:

* 1TB Western Digital WD Blue SN580 M.2 PCIe 4.0 x4 NVME (L 4150MB/s ; S 4150MB/s) ( 34849 )
* 2TB WD Blue SN580 M.2 PCIe 4.0 x4 NVME (L 4150MB/s ; S 4150MB/s) ( 34850 )

In: Technology

Answer 1

It depends a lot on the exact architecture of everything. These chips have a controller that manages the storage, and speed can be bottlenecked at the controller regardless of how much storage is behind it.

I can give an example of where twice the capacity helps. In the M2 MacBooks, getting 256 GB storage meant you got one 256 GB chip connected to one controller. The 512 GB option had two 256 GB chips each hooked up to one controller, so storage speeds went way up.