Kingston recently updated their SDHC/SDXC UHS-I U3 line with the addition of 128GB and 256 GB cards. Today we will be looking at one of these larger capacity cards. The Kingston SDXC cards take advantage of UHS-I Class 3 write speed performance making them ideal for capturing the latest 3D and 4K2K video formats. More info on this specification can be found here.

These cards have advertised read speeds of 90 MB/sec and write speeds of 80 MB/s. This is a nine fold improvement over standard Class 10 SD cards in terms of read speeds with an eight times increase in write speeds. When used in non- UHS-I capable devices they default to class 10 performance.