DDR4: Explained

This week we are talking about the latest iteration of the Double Data Rate type of memory. The subjects we will be discussing this week are:

    1. Why DDR4 is better than previous iteration?
    2. What are the prices of the new generation?

The latest generation of DDR is bringing as always a reduction in voltage that runs through the chips, which translates directly into a significantly reduction of power usage. Also, the new iteration performs better, due to higher speeds. Now when I say higher speeds, I mean truly higher speeds. When you think about the lowest speed from DDR3, you think about speeds as low as 1333 MHz. Now, the lowest speed on DDR4 is 2133MHz, which is an increase of 800MHz, which not so long ago was the second highest speed. This doesn`t mean it brings a dramatically increase in performance, at least for now, but maybe future CPU architectures will make use of the faster transfer rate. DDR4`s transfer speed is 3.2 GT/s, which translates into 3.2 Billions of transfers per second. That`s a doubling of DDR3`s 1.6 GT/s, which will translate in increases of performance. Also, at every iteration, the bandwidth get`s doubled up, which will translate in overall faster operations. Also the maximum amount of memory available is 128GB in a kit of 4.

Now, all of this increase in performance has a price tag, and as we all expected is a little bit high now, but surly it will fall slowly. To put this in perspective, a Quad Channel 16GB (2133MHz) kit costs about $210, which compared to a DDR3 kit with the same speed is only $160, and if we go higher in terms of capacity, the differences are even more noticeable. I have some good news though: the price will begin to go down, when the stock of DDR3, will be consumed. This is a safety measure, so that companies will sell all of or almost all of their DDR3 SKUs. If you think that this is a foolish decision, you might consider thinking again after I tell you the real story: If the prices of DDR4 were the same with the prices of DDR3, than all of us will go and buy DDR4, because it`s better. Then all the companies will have DDR3 on stock that almost no one will want.

In conclusion, DDR4 means lower power consumption, higher capacity and higher speeds. That`s the basics that you need to consider when buying RAM.

The Question of The Week:

Are you considering buying DDR4?

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