ADATA XPG SDXC UHS-1 U3 Card Review (64GB)


In order to test the rated speeds of the card we choose to use a few popular synthetic benchmarks which include ATTO, CrystalDiskMark, and Anvil Storage Utilities Professional. Not only are we going to use these benchmarks, we are going to run a comparison against other cards I have in my bag and test in a real world use scenario. This should give us enough to confirm the rated specs and give us a more in-depth view on how it performs.

Kingston MobileLite G3

To connect the SDXC card to our computer we have the Kingston MobileLite G3 USB 3.0 card reader. It is a compact and simple plug-and-play card reader that allows for USB 3.0 transfer speeds for any SD / SDHC / SDXC and microSD / SDHC / SDXC cards. It is a pretty good buy especially at only around $10 and will allow us to test the Kingston Ultimate at up to its max rated speeds.


ATTO Disk Benchmark is a relatively easy-to-use benchmark tool. ATTO Disk Benchmark relies on testing different file sizes with highly compressible data.  Although this is not the best representation of media files which are, for the most part, highly incompressible, it is a good start and is still the main mechanism most manufacturers use to determine their product specifications. In our testing, we have left the benchmark settings to default.


As you can see above, the ADATA XPG has been able to reach 91.5MB/s read and 80.5MB/s write. Though the speeds are around 5% less than advertised, this card is still very impressive. So impressive in fact, it is able to demonstrate the best write speed we’ve seen so far in our testing of SDXC cards!


Crystal Disk Mark is visually straightforward and is used for measuring the speeds at which your storage device reads and writes with random, mostly incompressible, data. Random data is more consistent with everyday use of a computer, such as transferring videos, pictures and music. Thus, this benchmark will be a better representation of speeds to expect on a video or stills camera over ATTO.


CrystalDiskMark also confirms the same 91/80MB/s read/write speeds ATTO displayed. This benchmark is better to go by as it shows us the performance with not only uncompressed data, but compressed data as well.


Anvil’s Storage Utilities is the best software program available for benchmarking flash media.  Not only does it give an accurate look at transfer speeds and throughput, but also, it goes even further by identifying file sizes, disk access times, as well as system and device identification. It even has many extra features such as endurance torture testing and a TRIM button feature to manually trigger TRIM on supported devices.

ADATA XPG 64GB Anvil Storage Utilities

Finally, here in Anvil’s Storage Utilities, we can see the card has reached a best of 86MB/s read, but it hasn’t reached near the rated write. 80MB/s write from the other benchmarks I can write off as margin of error, however seeing 68MB/s write in this benchmark is a little disappointing. But it is still more than twice the rated minimum write speed the U3 classification dictates. Now, let’s move on to the real world testing and final thoughts.

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