The SD card market is flooded with a multitude of capacity, speed, brand, and even bus speed options, so picking the right card for you can easily get confusing. You can split the market into two main sectors though – UHS-I SD cards are the older, slower variety, while UHS-II SD cards are roughly twice as fast, providing your camera can utilize that extra speed. If not, the card will still work, but at the slower USH-I rate.
Lexar's latest Silver Pro SD cards are in the UHS-II camp, with an advertised maximum read rate of 280MB/s and a peak write speed of 160MB/s. By comparison, Lexar's flagship 2000x Gold SDXC cards max out at 300MB/s read and 260MB/s write. However, the Silver Pro series isn't designed to break speed records - its aim is to offer quick UHS-II transfer speeds but at an affordable price.
