[ksec]

Normal rate ( Not Contract Price ) for LPDDR4 / LPDDR4X and LPDDR5 is roughly double the cost of DRAM per GB. Depending on Channels and package, the one used in M1 is likely even more expensive as they fit 4 channel per chip. DIMM and Board Space adds very little to the Total BOM.

[sliken]

Ah, I had heard differently, for the same clock rate?

In any case the apple parts are from what I can tell are:

https://www.skhynix.com/products.do?lang=eng&ct1=36&ct2=40&c...

In particular this one:

https://www.skhynix.com/products.view.do?vseq=2271&cseq=77