The speed rating of an SD card is usually shown on the SD card itself as certain number. These numbers are certain classes which defines certain minimum speed performance levels. In order to pass a class, the card must exceed the minimum speed value for both read and write.The classes defined by SD Association is as follows :
Other than this , some type of SD cards are available with designation of Ultra High Speed (UHS) which has higher performance of 50MB/s for UHS-I , 100MB/s for UHS104, and even 312MB/s for UHS-II.
The choice of SD card thus solely lies in the application for which it is chosen as different application requires different speed :
Other than this , some type of SD cards are available with designation of Ultra High Speed (UHS) which has higher performance of 50MB/s for UHS-I , 100MB/s for UHS104, and even 312MB/s for UHS-II.
The choice of SD card thus solely lies in the application for which it is chosen as different application requires different speed :
- Class 2 for SD video recording
- Class 4 and 6 for HD ~ Full HD video recording,
- Class 10 for Full HD video recording and HD still consecutive recording
- UHS Speed Class 1 for real-time broadcasts and large-size HD videos
