Strontium Nitro 566X SDXC UHS-1 Card and Nitro 466X Micro SDHC UHS-1 Card Review


Crystal Disk Benchmark is visually straightforward, and is used for measuring the speeds at which your storage device reads and writes in both compressible (oFill/1Fill) and random, mostly incompressible, data. Random data is more consistent with everyday use of a computer, such as transferring videos, pictures and music.

For the Strontium Nitro 566X SDXC card we ran Crystal Disk Mark using only random data, the reasoning behind this is that random data testing will produce results that are more consistent with every day use of the SDXC card. The results, again, did not disappoint with read speeds of 94MB/s and write speeds of 64MB/s.

For the Strontium Nitro 466X Micro SDHC card we ran the benchmark twice, using oFill (compressible) data first, and then proceeding to test with random data. Micro SD cards today have a wide range of possible uses. What was once used for strictly creating additional media storage for your cellular phone, is now being used for storage of applications and programs (E.g., Android APKs).

The results for the compressible data test produced speeds much faster than the listed 70MB/s, which we were expecting as compressible data is more consistent with greater transfer speeds and performance.  For a more realistic comparison, let’s go one step further and see how the Strontium Nitro 466X Micro SDHC performs with incompressible data (I.e., pictures and videos).

The Strontium Nitro 466X Micro SDHC card produced read speeds of 85MB/s, a very impressive performance as it even succeeds it’s own expectations of 70MB/s. The only performance flaw visible with the Micro SD card is the write speeds of 21 MB/s, it would have been nice to see speeds that are a little quicker.


QuickBench is another benchmark tool used to measure the transfer speeds and performance of storage devices. QuickBench is a good tool for confirming the previously produced read and write speeds seen above.

As we can see below, QuickBench demonstrates read and write speeds that are more in line with the speeds noted by Strontium. We can also see here that the Strontium Nitro 566X SDXC card is formatted in exFAT, which is necessary format for SDXC.


Again we see below that the Strontium 466X Micro SDHC card produces scores that reflect the read and write speeds noted by Strontium. This is the added benefit of using multiple benchmarking software tools to evaluate individual storage drives, as it gives us a more in-depth perspective of the drives.


Founded in 2002, Strontium is a relatively new company which specializes in flash memory products. It has been noted that Strontium produces 7,000,000 flash products every month, and here at Technology X we got the opportunity to check out the Strontium Nitro 566X SDXC UHS-1 64GB Card and the Strontium Nitro 466X Micro SDHC UHS-1 32GB Card. Let's take a look at how these two cards stand up to the competition. FEATURES Both the Strontium Nitro SDXC and Micro SDHC cards are resistant to water, temperature, magnetism and x-ray's. Each of these resistance's are extremely important for those professional photographers…

Review Overview


Stellar Flash Storage!

Strontium has produced two excellent flash storage drives. They both out perform their own expectations, are accompanied by a bunch of features and an excellent warranty. All of which comes at a great price point.

User Rating: 2.56 ( 131 votes)


  1. Thank you for your comparison and in-depth review. I am going to use my years old 32GB 466X to record 2.7K videos in Mavic Air. I hope i dont encounter stuttering of any sort.

    Many thanks again.

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