: Compensates for the fly-by topology delay between the clock line and data strobes on memory modules (DIMMs).

For hardware engineers, system designers, and memory manufacturers, this standard is the authoritative guide to ensuring compliance, interoperability, and performance in modern computing systems. What is the JESD79-4D Standard?

The "D" revision represents a mature compilation of architectural amendments and committee approvals. It refines the fundamental operations introduced in earlier versions of DDR4. 2 Gb to 16 Gb monolithic devices.