The Samsung Electronics 32GB Micro SDHC (MB-MS32DA/AM) is advertised as a 'class-6' card, which means it is supposed to deliver a minimum of 6MB per second in Sequential Write. My benchmark results, however, show that it is actually much faster.
I used a program call 'CrystalDiskMark 3.01 x64' to measure, among other things, the Sequential Read and Write speed of this card. The card reader I used is the Transcend USB 3.0 Card Reader (TS-RDF5K). This is important to note because older card readers will limit the maximum speed of this card. Here are my results:
- When connected to an USB 2.0 port on my computer:
Sequential Read = 21.8MB/s, Sequential Write = 16.6MB/s
- When connected to an USB 3.0 port:
Sequential Read = 23.95MB/s, Sequential Write = 21.9MB/s
Just for comparison, the SanDisk Ultra 32GB MicroSDHC (SDSDQUA-032G-U46A) is rated 'class-10'. It delivers Sequential Write speed of just 13.1MB/s in my test (connected to an USB 3.0 port), while its Read speed is much faster at 40MB/s. When used in a digital camera, for example, the Write speed is the most critical parameter for performance. By the way, most other 'class-10' microSDHC cards I tested just barely break the 10MB/s threshold.
As of this writing, the Sandisk Ultra card is priced almost 50% higher than this Samsung 'class-6' card. Therefore I consider the latter a truly 'Smart Choice' - exactly as advertised on its package.
[Update on Aug 12, 2015]
- Added screenshot of CrystalDiskMark benchmark result.
| Item Weight | 4.54 g |
|---|---|
| Hardware Interface | microSDHC |
| Secure Digital Association Speed Class | Class 6 |
| Manufacturer | Samsung Electronics |
| UPC | 887276969503 |
| Global Trade Identification Number | 00887276969503 |
| RAM | 8 GB |
