SDHC Card, have you tested yours?


New Member
Jun 9, 2007
Despite the class 4/6 rating, the speed actual varies...

I have a kingston 8GB SDHC Class 4 card comes as a free gift...

Today I bought a Sandisk Ultra 30MB/s Class 6 16GB card..

Although the sandisk has a higher rating, but in my camera 550D give one burst 6 raws... the Class 6 writes the raws in 20 seconds while the Class 4 Kingston only need 15 seconds..

Put in card reader and it shows that the Sandisk has a higher read 17MB/s compare to Kingston's 14MB/s
But with a lower write performance: Sandisk 6.6MB/s versus Kingston 6.9 MB/s

All read/write test has been performed 3 times to average...

The Kingston although is a Class 4 card, but actually has a Class 6 performance.. The Sandisk, however, just met its Class 6 but not more..
The claimed 30MB/s from Sandisk don't know how to reach....


New Member
Dec 21, 2007
At least they met the specs and this could only be just this piece. Won't bet everyone would be the same. :)

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