SD card speed classes Flashcards
1
Q
Three different generations of standards used to measure SD card performance
A
speed class (2, 4, 6 and 10), UHS (Ultra-high speed) speed class (U1, U3) and Video speed class (V6, …, V90)
2
Q
IOPS
A
Input/output operations per second
3
Q
Application Performance class
A
Two classes: A1 and A2. Both support a minimum of 10MB/s sustained write. A1 can sustain 1500 IOPS when reading and 500 when writing. A2 can sustain 4000 IOPS when reading and 2000 when writing.
4
Q
10 encircled by a ‘C’
A
Speed class 10. Can write at 10MB/s
5
Q
3 encircled by a ‘U’
A
UHS class 3. Minimum write speed of 30MB/s
