Jesd79-4d Pdf !!better!! -

It supports various data bus widths, specifically x4, x8, and x16 .

While JESD79-4D (DDR4) remains widely used, it has been largely superseded in flagship performance by the JESD79-5 (DDR5) standard. ddr4 sdram jesd79-4 - JEDEC STANDARD jesd79-4d pdf

The "D" in represents the fourth major revision of the original DDR4 standard. It supports various data bus widths, specifically x4,