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Here are performance measurements for various
memory cards. Remember that for digital cameras write performance is
the most important because it can limit a camera's shooting speed.
Read performance is important when a digital camera
is in playback mode. The following measurements were all done using the same
USB 2.0 multi-format card reader. The contents of the table below show
that practical performance can be very different from advertised performance.
Memory
cards are often advertised with either a speed rating (4X,10X,40X, etc.) or
a memory bandwidth (4MB/s, 8 MB/s, 12 MB/s etc.) rating yet read and write
speeds are very different.
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