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OCZ Secure Digital Trifecta 66X 2GB - OCZ Secure Digital Trifector 66x 2GB
The device is rated as having a 66X speed, and it's worth explaining what this actually means in real terms. Curiously, this is based upon on the 150KB/s speed of a single speed CD-ROM. It’s one of these rather antiquated methods that often live on, even if the numbers mean very little to the Average Joe consumer.
In raw figures then 66X means 9,900KB/s or 9.9MB/s. If one is being very strict it ought to be 9.7MB/s because you should divide by 1,024 when converting kilobytes in to megabytes, but as far as users are concerned the difference is negligible since this is a theoretical figure and not a real-world one.
In any case the 66X rating makes this a very fast microSD card, one of the fastest in fact, and though it will never match the best SD cards, it's still quick enough for most purposes and only the most demanding users will want more.
For testing we used a notebook running an Intel T7600 Core 2 Duo, 2GB DDR2 RAM and Windows Vista Ultimate. We ran two tests, a Large File Test and Small Files Test, testing both read and write speeds. Each test was run three times, and the system restarted and the card formatted prior to each run. We also ran the tests with the Trifecta inserted into the internal memory card reader and a USB 2.0 port, taking an average of three timings and converting them into MB/s.
We started with the write test, and both the Large File Test and Small Files Test showed little difference when using either the memory card interface or the USB port. The Large Files Test, which consisted of one large 1.07GB video file, produced a result of 3.45MB/s in the memory card slot and a slight increase of 0.02MB/s to 3.47MB/s when using the USB port.
Similarly, the Small Files Test – 1.01GB of image, document and audio files in different folders – produced almost identical, albeit slower, results. Using the memory card reader the Trifecta averaged 1.36MB/s while in the USB port it averaged 1.38MB/s – the results are nothing if not consistent.
The read tests, however, showed a significant difference with the USB port connection proving to be vastly superior. In the Large File Test the Trifecta averages 3.44MB/s in the memory card reader, but managed 6.71MB/s when using USB.
In the Small Files Test the story was much the same, with average speeds of 3.51MB/s using the card reader and 6.76MB/s using USB. This provides another compelling reason for having the USB option, even if overall these results are solid rather than spectacular.
There's little denying the usefulness of the OCZ Trifecta. At around £30 it may seem expensive for a 2GB memory card, but in truth it's more than worth it for the adaptability and flexibility it gives you. If you've had enough of juggling different SD cards all over the place, this could be the solution for you.
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