Legit Memory Reviews

SanDisk Extreme III 4GB SDHC Flash Card

Manufacturer: SanDisk
Product: SDSDX3-004G-A31
Date: Sun, Mar 29, 2009 - 12:00 AM
Written By: Nathan Kirsch -
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Performance Testing

To see how quick the performance of the SanDisk Extreme III 30MB/s Edition SDHC card is, we will be comparing it to a 2GB Class 6 ATP Pro Max II SDHC card and an older Kingston 2GB SD card. 

The SD Cards Tested

Each Secure Digital card was tested using Sisoftware Sandra 2009 SP3 on our office computer with the SanDisk ImageMate Multi-Card USB 2.0 Reader/Writer. 

Sandisk SDHC Card Benchmarking Results

Using the Removable Storage Benchmark found in SiSoftware Sandra 2009 SP3 we were able to get a pretty good idea of the performance that the cards offers with various file sizes. As you can tell from the chart above, performance generally increases as the file size goes up. The SanDisk Extreme III 30MB/s Edition SDHC easily beat the other two SD cards in all the tests!

SanDisk Extreme III Speed Tests

When it comes to write speeds the SanDisk Extreme III 30MB/s Edition SDHC Flash card got off to a slow start, but by the 2MB files test it was back in the lead.  The Multi-Card reader is capable of up to 27 MB/s write data, but our test cards couldn't duplicate that with this benchmark. The speed difference between the ATP and SanDisk class 6 cards compared to the Kingston SD card that is a few years old is staggering. In the 256MB files test there is a 4x difference between the the cards!

Sandisk Mobile 16GB microSDHC Card

Wanting to run another test on the 4GB SanDisk Extreme III 30MB/s Edition SDHC Flash card we ran the Flash Memory Toolkit v1.20 file benchmark. This benchmark tests 1-5MB file sizes, and showed that the card did best in the 4MB file test with write speed of 19.9MB/s and a read speed of 27.1MB/s. This card is very fast as you can see from the testing!

Next Page - Final Thoughts and Conclusions


Review Index
Page 1 - SanDisk Extreme III SDHC - 30MB/s
Page 2 - Performance Testing
Page 3 - Final Thoughts and Conclusions