Fast, well built, and MOST IMPORTANTLY reliable. Works fine within my EOS 6D DSLR and provides the following performance when benched within ATTO. Note that you need a UHS-I equipped reader/device to obtain these speeds.
Write: 55,4MB/sec Read: 83.3MB/sec
It may not be quite as fast as the Sandisk Extreme Pro cards which sell for more than twice the money, but it is certainly significantly faster than the Sandisk Extreme "Non-Pro" 45MB/sec cards which sell for about the same price, and which I already own several of.
edit: Above benchmarks were taken on my HP laptop's native SD reader. I re-ran the tests on my desktop using a Kingston USB3.0 card reader (via USB3.0 port) and obtained even better results.
Write: 65,7MB/sec Read: 91.4MB/sec
I have added both ATTO benchmark screenshots to the Amazon "Customer images" section. Hopefully everyone can see it.
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