Difference Between DDR3 And DDR4

DDR3 and DDR4 are two different generations of dynamic random-access memory (DRAM) that are used as the main memory in computers and other electronic devices. Both DDR3 and DDR4 have their own unique features, specifications, and performance levels. Here are some of the key differences between DDR3 and DDR4:


DDR4 offers faster data transfer rates than DDR3. DDR3 speeds range from 800 MT/s (million transfers per second) to 2133 MT/s, while DDR4 speeds starting at 2133 MT/s and can go up to 6400 MT/s. The higher transfer rates allow DDR4 to perform better in terms of overall system performance and data-intensive applications.

Power Consumption:

DDR4 operates at a lower voltage than DDR3, resulting in reduced power consumption. DDR3 typically operates at 1.5V, while DDR4 operates at 1.2V. This makes DDR4 more energy-efficient and generates less heat, which is especially important in devices with limited power budgets, such as laptops and mobile devices.

Memory Capacity:

DDR4 supports larger memory modules than DDR3, allowing for higher maximum RAM capacities in systems. DDR3 memory modules are available in capacities of up to 16GB, while DDR4 modules can support up to 128 GB. This increased capacity allows for better multitasking and handling larger data sets in memory-intensive applications.

Chip Density:

DDR4 has a higher memory chip density than DDR3, which enables the increased memory capacity per module. The increased density is achieved through advancements in memory manufacturing processes, allowing for more memory cells to be packed onto a single chip.

Bank Groups:

DDR4 introduces the concept of bank groups, which enables multiple memory operations to be performed simultaneously, improving overall memory performance. DDR3 does not have this feature, and its memory banks operate independently, limiting parallelism.


DDR4 generally has higher latency timings than DDR3, which means it takes slightly longer to access data stored in memory. However, the increased data transfer rates in DDR4 often offset the impact of higher latency, resulting in better overall performance.

Physical Design:

DDR3 and DDR4 memory modules are not compatible with each other due to differences in the physical design of the modules and the memory slots on motherboards. DDR4 has a 288-pin connector, while DDR3 has a 240-pin connector. The key notches on the modules are also in different locations to prevent incorrect installation.

In conclusion, DDR4 offers several advantages over DDR3, including faster data transfer rates, lower power consumption, higher memory capacity, and improved overall performance. However, it is essential to remember that DDR3 and DDR4 are not interchangeable, and the compatibility of memory modules depends on the specific system or motherboard being used.