ATTO Disk Benchmark:
The next phase of testing will use another synthetic benchmark to document the performance of the Kingston UHS-I U3 64GB SDXC card. ATTO Disk Benchmark v2.47 was used to compare the same four drives as seen on the previous page, but first we have a look at the screenshot of the application as seen after testing the UHS-I U3 card.
The 8MB read results from ATTO look much like the sequential read results from CrystalDiskMark, with the new Kingston card putting up a speed over 90MB/s, while doubling the performance of the Class 10 card, and quadrupling the other two cards.
ATTO details write performance just shy of the 80MB/s published specification, but at just over 76MB/s it is definitely still very impressive.
When dropping down to small files (8KB), the read performance of all four cards is shown to be a wash.
When writing small files (8KB), the Class 10 and UHS-I U3 cards perform identically at 2.92MB/s.