Is there a difference between a SDHC Class10 card and a SDHC UHS-1 class10 card?

Started Apr 8, 2011 | Discussions
Bo
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Is there a difference between a SDHC Class10 card and a SDHC UHS-1 class10 card?
Apr 8, 2011

A different question with the same premise as in another thread...

I need to get a Class10 card for my D7000. That is because I shoot a lot of sports and my class 6 cards start choking after 15 or so high speed shots at full size jpg. I wouldn't even dream of trying it in raw.

Amazon shows the Sandisk Extreme 8gig SDHC Class10 for $43. Then I happened to be at Best Buy last night and saw that they had a Sandisk Extreme 8gig SDHC HD Video Class10 that is also UHS-1.

They both say 30mb/s speed.

My understanding is that the UHS-1 rating means that even though it is a Class 10, it should be able to sustain faster write speed.

So is there a speed difference between those two cards? Does the UHS-1 rating on one of them mean anything if they both say 30mb/second? Will it make a difference is high speed shooting for sports?

Thanks very much.

Bo

Steve Bingham
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A simplistic answer
In reply to Bo, Apr 8, 2011

In spite of advertisements and standards, ALL class 10s are NOT the same. I trust SanDisk. BOTH would be plenty fast!
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sandy b
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Re: Is there a difference between a SDHC Class10 card and a SDHC UHS-1 class10 card?
In reply to Bo, Apr 8, 2011

this one is rated @45 is even less.

SanDisk Extreme Pro 8GB Secure Digital High-Capacity (SDHC) UHS-1

I bought mine at b&h for $36 for an 8 gb, one for each slot.

The biggest advantage for the D7k is how fast the buffer clears, although you may get a few more shots even with settings maxed out.

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madecov
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Re: Is there a difference between a SDHC Class10 card and a SDHC UHS-1 class10 card?
In reply to Bo, Apr 8, 2011

I purchased two of the 8G UHS-1 cards from Adorama at $36.00 ea.

These cards are the fastest available at the current time. The D7K buffer will clear faster and allow a few more shots before slowing down. The camera also does not slow as much as with class 10 cards.

Well worth the money.
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amooz
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A little more detailed
In reply to Steve Bingham, Apr 8, 2011

The SD Class X spec only specifies the minimum read/write speed of the card, not the actual speeds. That's why you have some Lexar Class 10 cards doing 10.4MB/s, some Kingston class 10 cards doing 20MB/s, and Sandisks doing 30+MB/s. The rating system only goes up to Class 10, which creates the aforementioned ambiguity as to just how fast the card is.

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Bo
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Re: Is there a difference between a SDHC Class10 card and a SDHC UHS-1 class10 card?
In reply to sandy b, Apr 8, 2011

Thanks for the info everyone!

Great tip, Sandy. I hadn't even noticed that. Just order one of the Extreme Pro from Amazon. Thank you.

Bo

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Cultured Woman
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Re: Is there a difference between a SDHC Class10 card and a SDHC UHS-1 class10 card?
In reply to Bo, Aug 7, 2011

The memory buffer will clear out faster with UHS-1 speed class cards.

I have noticed no difference in test I ran with Class 6 or Class 10 cards.

UHS-1 cards work to clear out the buffer faster than class 6/10 cards.

But, more expensive, faster UHS-1 cards do not work any better than each other...

See test meathods and results at: http://glamourphotography.co/gear/nikon-d7000-memory-speed-tests-sdhc-memory-cards-including-sandisk-extreme-pro-uhs-speed-class-1-45mbsec-and-several-popular-class-10-sdhc-cards/

And,

http://glamourphotography.co/gear/uhs-speed-class-1-sdhc-memory-cards-tested-delkin-8gb-elite-633x-secure-digital-uhs-i-95-mbsec-vs-sandisk-extreme-pro-32gb-45mbsec/

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