DDR内存= double data rate,3200Mbps内存的实际频率是 1600Mhz,内存在信号峰值和谷值都会传输信号,实际速率=1600*2

数量计算方法:频率*2*64Mbps=频率*2*64÷1024÷8 GB/S

RAM Type

Speed

Peak Transfer Rate*

DDR

266

2.1 GB/s

333

2.7GB/s

400

3.2 GB/s

DDR2

533

4.27 GB/s

667

5.33 GB/s

800

6.4 GB/s

DDR3

1066

8.5 GB/s

1333

10.6 GB/s

1600

12.8 GB/s

1866

14.9 GB/s

DDR4

2133

17 GB/s

2400

19.2 GB/s

2666

21.3 GB/s

3200

25.6 GB/s

Note:
* The practical data rate is determined by the system's Central Processing Unit and motherboard configuration.

内存带宽计算方法:64 bits/transfer * DDR transfers/s * number of memory channels

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