DDR3 和 DDR4 都是双倍数据速率 (DDR) 的版本。
双倍数据速率版本 3 (DDR3):
在 DDR3 中,执行自动刷新和自刷新以刷新其内容。一般自刷新用于低功耗,DDR3比DDR2功耗低。 DDR3 的时钟速度从 800 MHz 到 2133 MHz 不等,其中在某些情况下 2133 MHz 是其峰值,通常时钟速度在 1600 到 1800 MHz 之间变化。
双倍数据速率版本 4 (DDR4):
在 DDR4 中,仅执行自刷新来刷新其内容,这就是它消耗较少功率的原因。 DDR4 的最低时钟速度为 2133 MHz,它没有定义的最高时钟速度。
让我们看看 DDR3 和 DDR4 的数据速率和带宽图:
在上图中,我们可以看到 DDR3 的时钟速度在 1600 到 1800 MHz 之间变化,其带宽增加但小于 DDR4。 DDR4 的时钟速度从 DDR3 离开的地方开始,但它没有定义的最大时钟速度。
让我们看看下面以表格形式给出的它们之间的区别:
S.NO | DDR3 | DDR4 |
---|---|---|
1. | DDR3 stands for Double Data Rate version 3. | Whereas DDR4 stands for Double Data Rate version 4. |
2. | The cost of DDR3 is less than DDR4. | While it’s cost is higher or more than DDR3. |
3. | In DDR3, auto-refresh and self-refresh are performed to refresh its content. | While in DDR4, only self-refresh is performed to refresh its content. |
4. | DDR3 consumes less power than DDR2 but more than DDR4. | Whereas DDR4 consumes less power than DDR3. |
5. | The speed of DDR3 is slightly slow in comparison of DDR4. | While it’s speed is faster than DDR3. |
6. | DDR3 has a maximum of 16 GB memory. | While DDR4 has no maximum limit or capability. |
7. | The clock speed of DDR3 vary from 800 MHz to 2133 MHz. | While the minimum clock speed of DDR4 is 2133 MHz and it has no defined maximum clock speed. |
8. | DDR3 has lower latency than DDR4. | While DDR4 has slightly more latency than DDR3. |
9. | DDR3 was used earlier in computer systems. | While DDR4 is used now-a-days in computer systems. |