JEDEC Presents DDR5 Memory Standard Specs and It’s a Massive Upgrade

By Bill Toulas / July 15, 2020

The JEDEC Solid State Technology Association has presented the technical specifications of the DDR5 RAM standard, and it looks like it’s going to be a massive upgrade over DDR4. The semiconductor standardization organization has made improvements on all aspects, from power efficiency to memory speed and size, and the data transfer rates.

Thus, the DDR5 is going to be a totally new chapter of performance, but you should not expect any products to support it before late 2021 or early 2022. That said, we’ll have to stick with our DDR4 modules released in 2014 for a little while longer.

So, here’s what will change with the arrival of DDR5, and where they will be different compared to DDR4:


Source: TechRadar


Source: TechRadar

Regarding the DIMM channel design, we will still get 288 pins in the same position, so the sockets will match with older generations, but the functionality of the pins will change - so compatibility is out of the question.

There will be two 32-bit channels on each module, working independently, while the burst length for each channel is doubled from eight to 16 bytes now.

As for the bank groups, these go up to 8/4, from 4/2 that we have in DDR4.


Another important new upgrade concerns the implementation of the DFE (Decision Feedback Equalization) to enable IO speed scalability, reducing inter-symbol interference, and allowing for cleaner signaling at higher data transfer rates.

Finally, the power consumption won’t be limited to cutting 0.1 volts from the nominal rating, but there will also be additional power-saving modes implemented in DDR5. Since the new standard incorporates power management units and VRMs onto the module itself, motherboards are expected to get simpler as well.

It would be fair to point out that the above specs - especially the stacking of dies and the data density that will eventually give us 128 GB modules - will not be made immediately available on the market.

As with every generation, the manufacturing technology will have to mature in order to see the gradual improvements in products, so the first DDR5 DIMMs will be a lot better in every way compared to DDR4. Still, they won’t reach the full potential of the new standard.

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