Kingston 512GB SDXC Card Review (Class 10 UHS-1) – Size Matters


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.

Kingston 512GB SD Card ATTO

With performance highs of 93MB/s and 53MB/s as shown in the ATTO Disk Benchmark results, the Kingston 512GB SDXC Card is off to a great start.  Advertised performance is 90MB/s read and 45MB/s write.


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.

Kingston 512GB SD Card CDM

Crystal Diskmark data transfer speeds were a bit disappointing as both the read and write results were well below posted specs.  Let’s see how this fares in other tests.


The toughest benchmark available for solid state drives, much less SDXC cards, is AS SSD as it relies solely on incompressible data samples when testing performance. For the most part, AS SSD tests can be considered the ‘worst case scenario’ in obtaining data transfer speeds and many enthusiasts like AS SSD for their needs.

Kingston 512GB SD Card ASSSD

High sequential read and write data transfer speeds shown in AS SSD are amazing.  We really never expected such from any SDXC card, and in fact, we don’t often include AS SSD within our SDXC Card analysis’.  This is part and parcel to the fact that it takes so long to complete the 4K tests (in excess of 40 minutes) that it really isn’t worth the time spent on this software.


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.

Kingston 512GB SD Card Anvil

AS you can see through the Anvil Storage utilities result, we tested the Kingston SDXC 512GB Card within our newest Dell XPS 13 Ultra.  The results are very impressive.

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Benjamin Hojnik
Benjamin Hojnik

I’m totally expecting 1TB cards by end of this year. It should be possible with 3d flash