Delkin SD 633x UHS-1 Best £53, $60
Delkin’s 633x UHS-1 memory card boasts a quoted read speed of 95MB per second and a write speed of 80MB per second (one of the fastest claimed for any card on test). Our test, however, showed a consistent 82MB per second read speed, which was in line with the other cards. Write speeds through Quickbench came in at 68MB per second, putting this card just behind the Transcend.
Tested in the D600, it notched up a 29MB-per-second write speed, falling just behind the Samsung. However, Delkin subjects its cards to many more tests than other manufacturers, and in addition to the usual batch of shock testing, this model is tested against salt spray, ultraviolet light and other harsh environments. It also has built-in error correction and wear-levelling data management.
If you want a memory card that can stand up to some rough treatment, this one’s been built to last