The new DDR5 SDRAM standard. Twice the performance power and lower power consumption.

Among the key improvements will be a quadrupling of maximum die density, up to 64 gigabytes from 16 gigabytes under the old standard. Each DIMM can handle two 32-bit memory channels instead of only a single 64-bit channel. Since each bank operates independently of each other, the burst length can be doubled and greater efficiency can be achieved. That means, for instance, DDR5 SDRAM can perform two 64-byte operations in the same time it takes DDR4 SDRAM to perform just one operation.

Also improving power consumption demands will be an integrated voltage regulator. Such regulators previously were situated on motherboards. The new spec allows manufacturers to incorporate as many regulators as necessary to accommodate the number of DIMMs on end systems. This should reduce the cost and simplify the design of motherboards. With each DIMM providing its own voltage regulation, JEDEC refers to this approach as "pay as you go."Yet to be determined is how much improvement in power efficiency will be achieved with the slightly lower power consumption, 1.1 volts, compared with 1.2 volts for DDR4. The DDR4 specs had improved upon earlier numbers by 0.3 volts, 1.2 volts compared with 1.5 volts for DDR3.

As far as maximum data rates, DDR5 will handle 6.4 Gbps, doubling the DDR4 standard, although the first modules to reach market will be capped at 4.8 Gbps. The first consumer products with DDR5 specs are expected to roll off assembly lines some time in 2021.

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