Posted by admin in Flash memory data storage devices are memory cards. Used in varied digital devices, their speeds range from low to high.
Basic card transfer rate is 6x. Cards that have transfer rates above 66x i.e.10MB to 200x and more than that are called high speed cards. Higher speed cards that have speeds of up to 200x generally have the specification 2.0. The maximum read and write speed may however, differ. Generally the former is more than the latter.
The terms ‘pro’ and ‘ultra’ are, at times, used for high speed cards. It is seen that the cost of the memory card goes up with the increase in its speed.
The X-rating
The X-rating as in ’200x’ stands sometimes for the read speed, while sometimes for the write speed. It depends on the manufacturer of the card. Kingston however, uses it to indicate write speed.
Why do you need a high speed card?
A high speed card gives the user the major advantage of a high data transfer rate – both while reading data and while writing data. In digital cameras, it enables you to take very large pictures, click pictures without having to wait, record videos smoothly etc.
Some high speed cards
CompactFlash card formats are available in varying speeds. The CF 4.0 standard is a high speed card.
There are high speed Secure Digital card formats. In this case, the SD Association outlines the speed class ratings of the same.
SanDisk Extreme III (200x) and Extreme IV (300x) cards are high speed cards.
Memory Stick PRO Duo has high speed versions.
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