Data rate in the notebook card reader:
Warning: 500 MB tested by 122095.
Write rate: 31.8 MB / s
Read rate: 33.1 MB / s
Data rate with Transcend TS-RDF5K card reader, USB 3.0 on Win7 PC (MB Asus P8Z77-M Pro):
Warning: 500 MB tested by 122095.
Write rate: 45.4 MB / s
Read rate: 63.5 MB / s
Each tested with H2testw v1.4.
Declared by the manufacturer maximum speed is thus achieved.
Just do not make the plane so that each unit stocked :-)
For me nevertheless properly.