Benchmarking Test on new SanDisk Cruzer Ultra (SDCZ45) - Results do not reach the 15MB/s ??

Hi there,

Couple of weeks ago we received the new SanDisk Cruzer Ultra flash drives that were supposed to be the fastest Sandisk flash drives as Cruzer Titanium and Contour were discountinued many time ago ( I never understand why , they were excellent flash drives).

We opened a 8Gb Cruzer Ultra , SanDisk announces it as a 15MB/s transfer speed (in the retail packaging do not appear if it means read or write speed).

We run the Cruzer Ultra with the CrystalDiskMark 3.0 sofware and here are the results:

Performance test was made under Windows 7.

Maybe SanDisk are referring the 15MB/s to the read speed and not to write speed?

Waiting your comments,


From the small print on the sandisk website. Looks like write is only up to 10MB/s and that is only for the first 20MB transfered. Your bench marking tests surly are transferring more than 20MB so they are probably showing the transfer speed after the first 20MB transferred.

†† Up to 15MB/s read speed. Up to 10 MB/sec write speed applies to the first 20 MB of data transfer. Based on SanDisk internal testing; performance may be lower depending upon host device. 1 megabyte (MB) = 1 million bytes.