The term RAM is an acronym for Random Access Memory. It is a type of computer memory that one can read and change at any given point. A system loses its information and data stored in the RAM as soon as we turn off the power supply of the laptop or PC. The other commonly used terms for RAM are volatile memory, cache memory, temporary memory, and the main memory of a computer system.
What is DDR3?
The term DDR3 is an acronym for Double Data Rate version 3. It is a crucial type of third-gen SDRAM (Synchronous Dynamic Random Access Memory), mainly used as a type of system memory. The DDR3 can easily transfer data and info from one location to the other at a very high speed. It self-refreshes and auto-refreshes its content. The self-refresh mode allows lesser consumption of power as compared to the DDR2.
In the case of DDR3, the clock speed varies from about 800 MHz (Megahertz) to 2133 MHz. Here, 2133 MHz becomes the peak speed in a few cases. The usual clock speeds vary between 1600 Mhz and 1800 MHz, in general.
What is DDR4?
The term DDR4 is an acronym for Double Data Rate version 4. It is the very latest variant of RAM- widely deployed in the next-gens of computing. It has a higher rate of data transfer and a very decreased voltage- thus offering a better optimum efficiency at a higher speed.
The DDR4 only performs self-refresh to refresh its overall content- thus consuming less power. In this case, the minimum clock speed is about 2133 MHz. Also, it does not have any defined maximum clock speed.
Difference Between DDR3 and DDR4
| Parameters | DDR3 | DDR4 |
| Full Form | The term DDR3 is an acronym of Double Data Rate version 3. | The term DDR4 is an acronym of Double Data Rate version 4. |
| Release Date | The DDR3 RAM arrived in the market back in 2007. | The DDR4 RAM arrived in the market back in 2014. |
| Price | The DDR3 costs less than that of DDR4. | The DDR4 costs more than that of the DDR3. |
| Power Consumption | As compared to DDR2, the DDR3 consumes less power- but it is still more than DDR4. | DDR4, on the other hand, consumes less power than both DDR2 and DDR3. |
| Memory Size (Maximum) | The maximum memory size of DDR3 is 16 GB. | In the case of DDR4, we do not have any maximum capability or limit. |
| Clock Speed | In the case of DDR3, the clock speed varies from about 400 to 1066 MHz. | In the case of DDR4, the clock speed varies from about 1066 to 2133 MHz. |
| Latency | Latency in the case of DDR3 is lower than that of DDR4. | Latency in the case of DDR4 is way more than that of DDR3. |
| Type of Refresh | DDR3 mainly performs self-refresh and auto-refresh for the content that it holds. | DDR4 only focuses on self-refreshing the content that it contains. |
| Type of Memory | DDR3 RAM mainly works with ECC memory. It, thus, compresses the extra lanes of bytes. | The DDR4 offers its users computing capabilities on various platforms such as laptops, smartphones, PCs, tablets, etc. |
| Voltage | The DDR3 RAM basically runs on a voltage of 1.50V. | The DDR4 RAM basically runs on a voltage of 1.20V. |
| Interface | It has a 240-pin type of interface. | It has a 288-pin type of interface. |
| Older Generation Compatibility | The DDR3 RAM type is backward compatible with all of the older RAM generations. | The DDR4 RAM type is not at all backward compatible with the older RAM generations because it is very new. |
| Usage | The older generation computers mainly make use of the DDR3 RAM. | Mostly all of the newer generation computers make use of the DDR4 RAM. |
| Overall Demand | The demand for DDR3 RAM is slowly fading away over time. | The overall demand for DDR4 RAM is constantly rising because new technologies are slowly implementing it. |
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