SD card write speed

[olgierdc]

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What is the required write speed of SD Card to not slow down the camera's memory buffer. Does anyone have experience in this field? No video mode makes it possible to use slower and cheaper SD cards.

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[a.noctilux]

Cheap SD cards could damage your precious valuable data (maybe your M10 !).

I would avoid those cheappies for few dollars (euros) more to be safe.

 

Look at this link to be informed for cheaper or not SD cards:

http://www.l-camera-forum.com/topic/268663-sd-card-compatibility-issue/

[otto.f]

Cheap SD cards could damage your precious valuable data (maybe your M10 !).

I would avoid those cheappies for few dollars (euros) more to be safe.

 

Look at this link to be informed for cheaper or not SD cards:

http://www.l-camera-forum.com/topic/268663-sd-card-compatibility-issue/

The Topic you send the link of has few to do with cheap. Lexar is a very good and not at all cheap brand, this was about a specific card that did not seem to work on M10.

 

I interpret the OP as a question not a bout cheap brands but about: slower speed is less expensive in trustworthy brands. I have just been informed that 95Mb/s on an SD-card means a writing speed of 90, which appears to be fast enough to work with burst mode on a Sony. So I bought a 32Mb 95Mb/s SDcard for my M10 which works fine indeed. A 300Mb/s would have been about 3 or 4 times more expensive.

[olgierdc]

Two cards of the same capacity and the same brand. Why to pay several times more?

 

SanDisk Extreme Pro SDXC 128GB UHS-II 300/260 MB/s 4K U3 - price c.a. 270 Euro

SanDisk Ultra SDXC 128GB 80MB/s - price 60 euro

[olgierdc]

The Topic you send the link of has few to do with cheap. Lexar is a very good and not at all cheap brand, this was about a specific card that did not seem to work on M10.

 

I interpret the OP as a question not a bout cheap brands but about: slower speed is less expensive in trustworthy brands. I have just been informed that 95Mb/s on an SD-card means a writing speed of 90, which appears to be fast enough to work with burst mode on a Sony. So I bought a 32Mb 95Mb/s SDcard for my M10 which works fine indeed. A 300Mb/s would have been about 3 or 4 times more expensive.

 

The key is to know, what the write speed should be to use the full capabilities of the M10.

[digitalfx]

95MB/s cards are ideal speed wise. The newer 300MB/s cards are totally unnecessary for the M10, yet they work just fine.

You will only see the advantage with the faster cards when you are copying files to your computer and this is assuming you are using the correct bus on the PC and have a suitable card reader and cable.

 

I have found the newer Lexar 300MB/s cards to function 100% of the time without any issues others are experiencing, and despite the fact that they are overkill for the M10 I am using them (only because I ordered them for the SL- which does support the UHS-II interface)

 

Ive also used the Sandisk 95MB/s cards without any issues, although some here have reported problems.

 

Bottom line, the cheaper 95MB/s cards are plenty fast enough for the M10...and anything faster is unnecessary. Id check the SD Card discussion for specific cards.

[digitalfx]

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The key is to know, what the write speed should be to use the full capabilities of the M10.

 

The M10 doesn't support anything faster than 95MB/s...and by support I mean speed only. The faster cards are supported, they just don't have any advantage.

see my post above.

[UliWer]

For the M9 there was a test by forum users for a beta-version of a new firmware which should ensure better performance for different SD-Cards (and it did btw). You shot in continous mode until the buffer was filled and measured the times until the red LED stopped blinking. 

 

The writing time did not depend on the SD-Card's "speed", some Class 4 cards I tried were quicker than Class 10 examples. The writing speed was limited by the camera's ability to cope with different cards.

 

The first card I used with the M10 was a SanDisk Ultra 80MB/s 32GB. Sometimes it took horribly long to write a singe photo, and sometimes it even refused to do so. A Transcend 90 MB/s 32GB works without fault - and much, much quicker. I didn't try an old 2 or 4 GB Class 4 yet. Though I don't think there will be much difference in writing time - if the camera doesn't start again to dislike the card.   

[otto.f]

The key is to know, what the write speed should be to use the full capabilities of the M10.

As I said: 90, which is written at the back of the package and not at the front

@ #4: for video camera's 4K for instance

[olgierdc]

I made some tests.

 

 

 

Capacity

no photos in serie

capturing time (s)

writing time (s)

 

Ultra 40 MB/s (Silver)

16 GB

26

5,5

35,5

 

Extreme 60MB/s (Gold)

16 GB

26

5,5

15,8

 

Extreme Pro 95 MB/s (Black)

64 GB

26

5,5

10,8

 

 

 

Please note that all cards have been formatted in EXFAT. Thanks to that I got 26 images in series and faster writing time. Time of taking pictures is an approximation (+/- 0,5s).

SDFormater formats only FAT32 on MAC, so I used the system utility.

 

Please see next post.

[olgierdc]

In PDF format looks better

Write time.pdf

[jrp]

The only advantage of faster than 95mb/s cards is that you *may* be able to read the faster onto your pc. It's a hardware interface thing.

[olgierdc]

The only advantage of faster than 95mb/s cards is that you *may* be able to read the faster onto your pc. It's a hardware interface thing.

 

 

Unfortunately I disagree. The camera is more responsive. Please check with your M10.

The test concerned the writing speed of the camera and not the computer.

Also, the test involved writing to an SD card and not reading.

[digitalfx]

Unfortunately I disagree. The camera is more responsive. Please check with your M10.

The test concerned the writing speed of the camera and not the computer.

Also, the test involved writing to an SD card and not reading.

He said "faster" than 95mb/s

 

You won't see the same results with cards faster than 95mb/s.

 

 

 

Sent from my iPhone using Tapatalk Pro

[olgierdc]

He said "faster" than 95mb/s

 

 

 

You're right.

To summarize, it is better to use faster SD cards, because then the camera will work faster and the writing time will decrease significantly. But from a certain speed of card the camera will not accelerate further. Unfortunately I do not have faster cards than 95 MB / s to check their in camera write speed.

Just as "jrp" correctly mentioned, the only advantage of even faster cards will be the ability to faster transfer photos onto PC.