Memory Card Transfer Rates
| Rating | Speed (MB |
| 6x | 0.9 |
| 32x | 4.8 |
| 40x | 6.0 |
| 66x | 6.0 |
| 100x | 15.0 |
| 133x | 20.0 |
| 150x | 22.5 |
| 200x | 30.0 |
| This table lists some common ratings and their respective maximum transfer rates | |
Size isnt everything when you look for a digial memory card.
How fast can your storage card save your image? Your goal is to have the card that saves as fast as your camera will allow, (and you can afford).
The rate the card can transfer the data into an image should be just as important to you. (Note: Your camera can only transfer at it's capable rate, so don't waste your money with a card that is faster than your camera. It won't help). See your camera manufactors site or manual to find your camera's highest capable transfer rate).
High-speed cards are made with higher data transfer rates like 66x (10 MB/s), and high-end cards have speeds of 200x or higher.
Note that maximum read speed and maximum write speed may be different, with maximum write speed typically lower than maximum read speed.
Some digital cameras require high-speed cards (write speed) to record video smoothly or capture multiple still photographs in rapid succession. The SD card specification 1.01 allows for a maximum speed of 66x.
Higher speeds of up to 200x are defined by specification 2.0.
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