Access speed refers to the data transfer speed of the flash memory card when data is written or read. Different types of flash memory cards use different interface specifications, and naturally their access speeds are also different. Even the same type of memory card is interfered by factors such as the manufacturing level of various manufacturers, the superiority of the card reader, and even the performance of the host connected to it, and they also show different access speeds in practice. The same card used in different cameras may also show differences in speed, which is affected by differences in the performance of the camera's flash card interface.
The access speeds of flash memory cards claimed by various manufacturers are basically the highest access speeds of flash memory cards in a certain state, which is basically impossible to achieve in practical applications. The concept of double-speed flash memory cards is also widely circulated in the market, such as 40-times CF cards. Double-speed is the speed calculation concept of optical storage devices. 1x speed is equal to 150KB/s data transmission speed, then 40x speed will reach 6MB per second. Speed. However, in practical applications, these high-speed flash memory cards have not reached such a high speed, and may be able to reach or close to such a high speed on a specific digital camera or card reader device. However, in most applications, high-speed flash memory cards are indeed faster than ordinary flash memory cards, but it does not exceed the access speed of ordinary flash memory cards by so many times.