UHS-I memory cards

[SmartWombat]

Not all seem to be created equal.

Lexar 16GB 600X SD (SDHC) Card - Class 10 / UHS-1
Minimum 90MB/s read transfer, write speeds lower. Speeds based on TestMetrix certified tester. Actual sustained speed may vary depending on host device. x=150KB

SanDisk 16GB Extreme Pro SD Card (SDHC) - Class 1 UHS 95MB/s - Class 10
Write Speed: 90MB/s
Class: Class 1 UHS
Read Speed: 95MB/s

So the Lexar < 600x write, >= 600x read.
And the SanDisk is 600x write, 633x read.
Bigger numbers are better, aren't they?
To most consumers 600 and 633 would look better than 90 and 95.
And they wouldn't know that 95 is faster then less than 600.

[wfooshee]

I've noticed the same thing, actual speeds or factors, and until I just saw your post, I wasn't sure what 1x was. I knew it wasn't fast, though.

[freygr]

I have an HD Video card, and it's an SanDisk Extreme rated at 30 MB/second, and the 64 GB cards are also rated at 30 MB/s but then I have another SanDisk Extreme class 10 rated at 45 MB/s on to the 16 GB cards has 4 hours printed on it. Unless you are shooting video almost any newly manufactured card now is mort than fast for still photos

[wfooshee]

Depends on your camera's frame rate and resolution! My D5000 shoots 8 or 9 frames at max, then has to wait for buffering. With a class 10 card, although I don't know the actual MB/sec rating.

[OldClicker]

From my recent research, the class is a measure of the sustainable speed of the card (for longer transfers - video) while the GB/s measures the fastest burst rate (still camera 'machine gun' burst). Class 10 is only a minimum of 10MB/s sustained. Some of the newer cards are 100+MB/s burst. - Terry

[wfooshee]

That's why I said I didn't know the MB/sec rating on my card. It's a cheap class 10. I don't know if my camera would benefit from or even be able to use a UHS card. From what I'm reading, you don't get UHS speeds unless your device has specific UHS controls built into it.