What is the meaning of the"Class Speed Rating" shown on SDHC cards?

Category : Specification / Capacity / Performance

The SD Association defines 4 speed classes to help users identify SDHC card speed and performance. The class speed rating specifies a minimum sustained read/write speed (Class 2: 2 MB/s; Class 4: 4 MB/s; Class 6:6 MB/s; Class 10: 10 MB/s). You can identify the performance of your memory cards and host devices according to the Speed Class Logo.

Class/ Transfer Rate Min. Read Rate Min. Write Rate
Class 2   2 (MB/sec) 2 (MB/sec)
Class 4 4 (MB/sec) 4 (MB/sec)
Class 6  6 (MB/sec) 6 (MB/sec)
Class 10  10 (MB/sec) 10 (MB/sec)
Is the answer helpful?

Technical Support

If the answer can't help you, you can contact the Tech Support Department

Get Started

You have already accepted cookies, but you may still revoke your consent at any time. Please see more details at Cookie Statement. Change Settings

You have already rejected cookies, but you may still give your consent at any time. Please see more details at Cookie Statement. Change Settings