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08-04-2009, 12:42 PM   #1
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Write speed of my three SDHC cards

EDIT: okay, make that four, I found a SanDisk Ultra II in my Eee...

Just copying six large files totalizing 4.5Gb over to my cards using a dos xcopy command and my SanDisk MicroMate cardreader. All cards tested three times. Fastest time used.

Sandisk Extreme III 30Mb/s edition (8Gb): 313s -> 13.78Mb/s
Sandisk Ultra II (4Gb): 372s(*) -> 8.58Mb/s
Patriot Memory Class 6 (8Gb): 517s -> 8.34Mb/s
Verbatim Class 6 (16Gb): 538s -> 8.01Mb/s

* as it's a 4Gb card I copied a file less, for a total of 3.1Gb

I did the test to see how my new 16Gb cards compared with my "old" cards (I can feel the difference between the Patriot and SanDisk Extreme card in my K20D).

I got two of the new Verbatim cards, and one of them fluctuated quite a bit: 519, 565, 960 and 689 seconds to complete the copy (all the other cards where consistent within a couple of seconds). I'll do further test of it later - it may be sick or something... or my PC was busy doing something...

The verbatim cards where pretty much the cheapest class 6 cards I could find. They are not going to be used for anything critical.

Last edited by tcdk; 08-05-2009 at 01:43 AM. Reason: Added the Ultra II card info
08-04-2009, 02:14 PM   #2
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If I recall correctly, some other tests that I've seen had the Sandisk Extreme III maintiaing the highest average read write speeds of those tested.
08-04-2009, 03:07 PM   #3
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It's pretty clear that not all Class 6 cards are created equal...

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