Memory Performance

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.