The new Superior 32GB UHS-1 microSDHC cards from Silicon Power are the new high-speed variants while keeping the same footprint. The current model has rated speeds of 90MB/s reads and 45 MB/s writes and succeeds to distance itself quite a bit from the Class 10 variants. The new cards can be used in old readers too (are backwards compatible) but this way we will not be able to benefit from the enhancements these offer.