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Image Buffer Size and Settings

RLDubbya

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"RE: My new UHS-1 Card arrived"

RLDubbya Silver Member Nikonian since 24th Dec 2011
Mon 02-Jul-12 10:51 AM

>Here is an update to the test results above using the same
>protocol.
>
>
>***************************************************
>SanDisk Extreme Pro 16Gb 45MB/s Class UHS-1
>07s - r10 RAW 14BIT Lossless A-Dist-OFF
>***************************************************
>
>The Transcend card took 23 seconds to clear the buffer, the
>SanDisk Extreme 30MB/s took 9 seconds and the new 45MB/s UHS-1
>card took 7 seconds to totally clear the buffer.
>
>Since it takes only about 1.5 seconds to take the 10 shots
>that fill the buffer in the camera a card that could keep up
>with that data rate would need to have a data transfer rate of
>about 90MB/s. And this assumes the internal
>processing/buffer/write system could deliver data at that
>rate. In fact a card like that would minimize the need for a
>large internal buffer.
>
>
>

>It also seems that the Transcend card data point does not fit
>into the graphed data assuming a linear relationship between
>write speed and time to clear the buffer. There may be some
>other reason this card write much slower that the SanDisk
>samples I have tested. I would have expected a time of about
>13 seconds for a Class 10 card based on a linear relationship
>from the SanDisk data.
>
>

Click on image to view larger version

>

I wanted to thank you for this thread, and this post in particular. I was shooting with Transcend cards, and happy enough in my ignorance: they worked, never burped. After deciding to replace them, and reading this, I bought the latest & greatest SansDisk Extreme Pro cards, and now am enjoying a noticeably faster buffer clear speed.

Another example of how Nikonians helps me to get the most out of my gear.

Visit my Nikonians gallery.

Visit my Nikonians gallery.

This is a hot, active topic! Image Buffer Size and Settings [View all] , DeanAZ Gold Member Expert nature photographer , Sat 08-Jan-11 03:57 AM
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