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Wednesday, February 20, 2013
Kingston UltimateX 100X 32GB SDHC review

2. Package, tests

The Kingston SDHC 32GB UltimateX is sold online for about $25- a very attractive price is very attractive for the category.

Below you see the retail package of the SD card, which is secured into a hard plastic shell:

The Kingston UltimateX 100X 32GB SDHC card has the typical dimensions and appearance of SD cards. It measures 24mm x 32mm and is 2.1mm thick.  These cards are the most widely used for digital cameras of all sizes. The card can be write-protected using the lock slide on its left side.

The card's speed class rating (10) is within a letter "C" on the label. The Class 10 rating ensures a 10MB/s minimum write speed. Generally, the speed classes are minimum requirements and SD card manufacturers can define constant minimum write speeds that are higher than the speed class designation of the SD card.

The speed class ratings are crucial for video capture. And since video capture data rates are critical for camera manufacturers, they typically recommend a particular SD speed class for use when capturing video with a camera or camcorder.

Let's run some benchmarks with Kingston UltimateX 100X 32GB SDHC. For the test we used a USB2.0 adapter and ran the H2Testw and the CrystalDiskMark software packages.

With the H2Testw, Kinsgton's SDHC gave a 18.8MB/sec read and 12.8Mb/sec write - both sequential:

The CrystalDiskMark 3.0.2e x64 edition gave slightly higher numbers. The sequential reading speed was 20.12MB/sec and writing was 14.47MB/sec:

The results confirm the performance figures quoted by Kingston. Of course, have in mind that we are dealing with a Class 10 card here, so do not expect to see the performance of the some more expensive UHS Speed Class 1 cards, especially in the writing part. For instance, below you see a CrystalDiskMark test with Sandisk's Extreme UHS-1 SDHC 32GB:

H2Testw Sequential Read Sequential Write
Kingston UltimateX 32GB SDHC 18.8MB/sec 12.8MB/sec
Sandisk Extreme UHS-1 SDHC 32GB 19.2MB/sec 17.4MB/sec


CrystalDiskMark Sequential Read Sequential Write
Kingston UltimateX 32GB SDHC 20.12MB/sec 14.47MB/sec
Sandisk Extreme UHS-1 SDHC 32GB 20.62MB/sec 19.86MB/sec

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