Kingston UHS-I U3 microSDXC Card

4K2K video recording is getting more popular, as such we need faster media to record the higher resolution.  Kingston works hard to keep up with the technology needs of today's consumer. At CES 2015 they announced the microSD UHS-I Speed Class 3 card, capable of 90MB/s read, and 80MB/s write.  The previous generation, UHS-I U3 was rated for 30MB/s read/write. Kingston-64GB-microSD-Package-Front This new microSD card will be available in three storage sizes, 16GB, 32GB and 64GB.  In addition, it will be offered in two different packs, one with a microSD to SD adapter, and one without.  Kingston provided the 64GB version with the included adapter, part number SDCA3/64GB, which can be found online for $53.72 with free shipping. Kingston-64GB-microSD-UHSi-Class-3-Combo As the popularity of high speed rugged cameras grows, the need for rugged storage devices is also growing.  Kingston has listed that this little microSD card is water, shock, vibration, x-ray and temperature proof, and they back that up with a Lifetime warranty. Kingston-MobileLite-G3 Of course to take advantage of these high speeds, not only do you need a camera that can use it, but you will also want to be able to transfer those pictures and video's to a computer for editing and storage.  Kingston recommends using their media readers such as the MobileLite Gen 3, MobileLite Gen 4 or their USB 3.0 Media reader. Features and Specifications
Kingston UHS-I U3 Specifications
Part Numbers 16GB:  SDCA3/16GB; 32GB:  SDCA3/32GB; 64GB:  SDCA3/64GB
Performance Read:  90MB/sWrite:  80MB/s
Environmental Protection Waterproof, Shockproof, Temperature, X-Rays
Warranty Lifetime Warranty
There isn't much to the Kingston UHS-I SDCA3/64GB microSD card, let's jump right into some performance benchmarks.

Benchmark Performance

Testing the speed of the Kingston UHS-I microSDXC card in a camera is difficult as it all comes down to how you perceive the speed is.  So to test the speed of the card, we will use standard synthetic benchmarks to evaluate the Kingston card against a standard Kingston 32GB microSD and a Sandisk Extreme Pro 64GB, which is rated for similar speeds as the new Kingston. All testing was completed using a SuperSpeed USB 3.0 port on a Gigabyte Z97MX-Gaming 5 motherboard while running Windows 8.1 with Update 1 and all the latest drivers. CrystalDiskMark CrystalDiskMark 3.0.3 is a good benchmark to gauge how well a drive will perform.  Many of the drive manufacturers have used this benchmark to show off the performance of their drives.  It provides a quick benchmark of Sequential and Random read/writes, and included a NCQ with a queue depth of 32. Kingston-64GB-microSD-CrystalDiskMark CrystalDiskMark is showing that the Kingston SDCA3/64GB performs rather well overall considering it is a microSD card.  One bit of concern is the writing of 512K blocks, the 0.852 MB/s score seems to be rather low. Kingston UHS-I Class 3 CrystalDiskMark Obviously the Kingston SDCA3 card is going to perform much better than a standard microSD card, and at Sequential read/write is matches the Sandisk card. ATTO ATTO is another benchmark that will provide results over any type of drive; hard drives, SSD, USB and RAID arrays.  It allows the user to set various factors such as data transfer size, length  of transfer, queue depth and several other options.   ATTO provides a wide range of results across the various lengths, we will take a closer look at three of these, and see how the data compares for the read and write speed. Kingston-64GB-microSD-ATTO ATTO reports similar results to CrystalDiskMark at the higher transfer size.  Receiving 75.5MB/s write and 94.5MB/s read speeds at the highest transfer sizes. Kingston UHS-I Class 3 ATTO ATTO favors the Sandisk card a little when it comes to read speed, but is 0.5MB/s difference enough to care about.  The write test shows a big difference between the Kingston and Sandisk cards, with the Kingston performing 15MB/s.  

Final Thoughts and Conclusion

If you have a need or desire to have one of the fastest microSDXC cards available, there are only a handful of choices.  The SD Association came up with the UHS-I Speed Class 3 rating to support 4K2K video recording, which requires a minimum of 30MB/s write speed.  Kingston has released their first card with the latest UHS-I Speed Class 3 rating, featuring read speeds up to 90MB/s and write speeds up to 80MB/s. Kingston-64GB-microSD-Package-Front The Kingston SDCA3/64GB card surpassed the rated read speed of 90MB/s with a CrystalDiskMark score of 93.75MB/s, but fell just shy of the rated write speed of 80MB/s with a score of 74.57MB/s on the test system; it still exceeds the requirements of the Speed Class 3 rating. The SDCA3 microSDXC card is available in three sizes, 16GB, 32GB and 64GB both with and without the adapter.  All of which includes a lifetime warranty if anything should happen to it.  The 64GB version that Legit Reviews took a look at can be found online for $53.72 with free shipping. LR Recommended Award Legit Bottom Line:  The Kingston SDCA3/64GB is a very fast microSDXC card that will support 4K2K video recording.  The clear choice is the Kingston SDCA3 if you want an extremely fast microSDXC card without spending a lot of money to record 4K Ultra HD video.