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What is DDR4?

The pursuit of faster speeds and lower energy consumption has always been a major driver of technological advancement. The field of memory is no exception. With each successive generation of new memory, each is faster, higher in capacity, and more energy efficient.

When speed and capacity of DDR3 memory reached a bottleneck, and DDR3L could no longer provide significant improvements in energy consumption, DDR4 memory was born. From the figure below, we can see that DDR4 has reduced the required voltage from 1.2V compared to 1.35V for DDR3L. What’s more, DDR4 is 50% faster than DDR3L.

Comparison of Energy Efficiency: DDR3 vs. DDR4
Comparison of Energy Efficiency: DDR3 vs. DDR4

In addition, DDR4 modules have several significant differences in appearance to DDR3.

1. More Pins
In terms of U-DIMM for desktop PCs, DDR4 looks very similar to a DDR3. However, DDR4 has 288 pins compared with DDR3’s 240 pins.

2. Curved-Edge Design
The edge connector on DDR4 modules are slightly curved to facilitate insertion. This design also lowers insertion force, as not all pins are engaged at the same time during module insertion.

DDR4 modules have more pins for improved performance and curved edges for enhanced structural robustness and effortless installation.
DDR4 modules have more pins for improved performance and curved edges for enhanced structural robustness and effortless installation.

3. Increased Thickness
DDR4 modules are slightly thicker than DDR3 (1.2mm vs. 1mm) to accommodate more signal layers for higher frequencies.

DDR4 modules have more signal layers than DD3, providing for more reliable and stable performance.
DDR4 modules have more signal layers than DD3, providing for more reliable and stable performance.

4. Higher Desnsity
DDR4 offers higher module density. They contain more internal banks for up to 2 times higher density than DDR3, allowing consumers to enjoy more capacity at a comprable price.

Higher module density provides for more capacity. Higher module density provides for more capacity. Higher module density provides for more capacity.
Higher module density provides for more capacity.

#DRAM #DDR4 #DDR3 #Memory

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