DDR4 is gradually ending its years of shine. The coming row of RAM, DDR5, has been adopted by the body of most standards in microelectronics. The official launch is scheduled for 2021.
The Joint Electron Device Engineering Council adopted the DDR5 (JESD79-5), eight years after that of DDR4 (JESD79-4) and a little over a year after LPDDR5. This upcoming standard is adopted in order to meet current industry requirements, with an announced (launch) speed of 4.8 Gb / s, compared to 3.2 Gb / s for DDR4 today.
The official JEDEC website explains, in an announcement, that this bit rate was reached by doubling the Burst Length in BL16 (thus going from 8 to 16 bits). Other enhancement over the new standards was also cited. Each DDR5 module will have two fully independent 40-bit sub-channels for better efficiency and long-term reliability. Each element can similarly reach 8 GB (compared to 2 GB currently), with a maximum quantity of 128 GB in UDIMM. Another new feature is the voltage regulation. In fact, it goes from 1.2 V to 1.1 V. Now, it will also be performed by each bar, and no longer by the motherboard. This drop in voltage during operation logically promises better performance in terms of the energy.
Higher voltage regulation for greater energy performance
The voltage regulation will be performed by each bar, and not by the motherboard. This drop in voltage during operation logically suggests improved energy performance. For connectivity, the number of pins remains 288 pins (as the origin). Changes are also planned for the keys, the notches that allow placing the RAM module correctly in their location.
Actually, many industry manufacturers have already planned to implement DDR5 in their products. Processor makers including AMD and Intel, of course, but also Micron, the Samsung group, and South Korean semiconductor company SK Hynix, which is announcing mass production by the end of this year.