What are the data transfer rates for DDR, DDR2, DDR3 and DDR4?

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The table is compared speed with peak transfer rate     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.

PCIe SSD 250H

ESD310 SSD Externo

StoreJet 25M3C

DrivePro 620

DrivePro Body 70

USD340S

JetFlash 930C

HUB5C

MTE720T

JetFlash 280T

USD460T & USD460I

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What are the data transfer rates for DDR, DDR2, DDR3 and DDR4?

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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.