A Much Faster SD Card Is Coming: UHS-III

February 27, 2017

By Greg Scoblete

Between super high-res still cameras, 4K, 360-degree cameras and the impending arrival of 8K, there are plenty of data-demands being placed on memory cards.

The newly announced UHS-III SD card specification looks up to the task of handling these multiplying megapixels. It will double the current top SD card transfer rate to 624 MB/s.

The spec supports backwards compatibility with older cards so UHS III-enabled card slots will still be able to read data from older SD cards. The UHS-III spec will also support microSD cards.

The UHS-III spec may be fast, but it’s important to keep in mind that it’s a measure of maximum speed, not sustained speed (the kind of speed that matters for video recording). The SD Association ranks sustained speed using a different nomenclature (U1 and U3). U3 SD cards are the current speed champs delivering sustained speeds of 30 MB/s.