Migration to DDR5 Memory Modules White Paper
■DDR5 DRAM products provide low-latency, high-performance, almost infinite access endurance and low-power consumption, which makes them suitable for applications requiring complex system deployments to hand-held devices.
■DDR5 memory devices support data rates at a lower I/O Voltage than DDR4. DDR5 DRAMs and dual-inline memory modules (DIMMs) based on DDR5 DRAMs are industry-standard products driven by the Joint Electron Device Engineering Council, or JEDEC.
■SMART Modular Technologies is a contributing member to JEDEC, and worked closely with other members to define the standards for DDR5 memory devices, including DIMMs.
●DDR5 Features and Applications
■DDR5 features data rates of up to 6400 MT/s at 1.1V I/O voltage, addressing the needs of several applications, such as:
▲Networking
▲Cloud Computing
▲PCs and Servers
▲Embedded Computing
■DIMMs are built using x4-, x8- or x16 DRAMs which can cater to applications that typically have different priorities. Some compute-intensive applications can implement their memory sub-system using x80 DIMMs, based on more cost-effective x8- or x16 DRAMs. Such applications can also leverage the higher Reliability, Availability, and Serviceability (RAS) features of DDR5-based DIMMS to minimize the downtime during memory-related failures.
■DDR5 DIMMs are a natural progression from DDR4 DIMMs or earlier iterations, and provide system designers with an easy path to upgrade their product offerings. DDR5 DIMMs at 4800 MT/s (DDR5 4800) are planned for release followed by higher speed grades (DDR5 5600, DDR5 6400).
■DDR5 DIMMs support burst lengths of 16 beats, better refresh/pre-charge schemes allowing higher performance, a dualchannel DIMM architecture offering better channel utilization, integrated voltage regulators, increased bank-group for higher performance, and Command/Address on-die termination (ODT), a few of the many new DDR5 features enabling higher performance.
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