Performance with Secure Digital Cards

Intel IOMeter Sequential Read and Write

Like with Compact Flash cards, the results and, accordingly, the controllers can be divided into two groups. One group includes those readers that deliver a read speed of less than 10MB/s. This group includes the AU6332 controller with firmware 01.26 and 01.29, the IC1210 and the ND3260 controller. The SanDisk USB provides a somewhat higher speed, but doesn’t reach 10MB/s, either. The other controllers fall into the second group which in its turn splits into two subgroups with absolutely identical results. The highest speed on 64MB and smaller data blocks are delivered by Alcor Micro’s AU6263 (with firmware 01.00), AU6332, AU6333 and AU6377 and by the SanDisk MicroMate.

The overall picture doesn’t change much at writing. The SanDisk USB is again the best among the losers, almost reaching a speed of 10MB/s. The leaders go in two groups again with a difference of 1MB/s on small data blocks.