Article ID : 00055967 / Last Modified : 14/11/2017

What are the different Speed Class ratings for SD, SDHC, and SDXC memory cards?

Applicable Products and Categories of This Article

The following are Speed Class ratings for SD, SDHC and SDXC memory cards:

  • Class 2: Recommended for Standard Definition video recording
  • Class 4: Recommended for High Definition video recording
  • Class 6: Recommended for High Definition video recording 
  • Class 10: Recommended for Full High Definition video recording
  • UHS-I Class 1:  For recording large-sized High Definition video
  • UHS-II Class 3:  Capable of recording 4K video

NOTE: The Speed Class rating is the official unit of speed measurement as defined by the SD Association. For complete information, visit the SD Association website.