Is my Transcend 400x UDMA a dud?

Started Sep 29, 2010 | Discussions thread
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mark4ksu
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Is my Transcend 400x UDMA a dud?
Sep 29, 2010

I would like some experienced folks to help me determine if I just bought an abnormally slow card. It's a Transcend 16Gb 400x UDMA card for my 7d. My 'old' card is a Kingston 16Gb Elite Pro which is 133x. I was expecting a big increase in write speed after I fill the buffer, so I have been shooting continuous RAW until the buffer fills and then timing how long it takes to clear.

With both cards, the camera pauses around 21 pictures. The Kingston takes a about 27 seconds to write the data. The Transcend takes about 24 seconds. Should the Transcend be faster? I was expecting a much bigger difference, and I'm a little dissapointed. I bought it from Newegg, so it shouldn't be a fake. Thoughts or tips?

Thanks,
Mark

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