DDR4 operates at a native 1.2V , a significant reduction from DDR3’s 1.5V. This lower voltage directly correlates to improved power efficiency and reduced heat generation.

While the initial JESD79-4 was published in September 2012, the standard has evolved through several iterations to refine performance and stability: JEDEC - JESD79-4D - DDR4 SDRAM - Standards | GlobalSpec

Engineers who rely on second-hand summaries often make several critical mistakes. The official JESD794D PDF prevents these: