Sandisk 64GB CFexpress does not support RAW video on EOS-1D X Mark III?

On Canon's website for the EOS-1D X Mark III, there is a footnote for the main product photo that says:
"The Sandisk 64GB CFexpress card does not support RAW video recording"

Is this a limitation of the camera or the card?
I haven't found a similar note in the Video White Paper.
5.5K RAW 5472x2886 @ 59.94 would have a data rate of 2600 Mbps per video white paper.
And the card specs indicate " up to 800MB/s write speed ".
 

BeenThere

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Sep 4, 2012
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Yeah and it gets really expensive when you buy the Gold first and cannot return it... Ask me how I know :LOL:
The higher the memory capacity of the prograde gold cards, the faster the write speeds. By the time you get to 512 GB, they they are actually pretty fast; but still don’t match the Cobalts.
 
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SteveC

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Sep 3, 2019
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The higher the memory capacity of the prograde gold cards, the faster the write speeds. By the time you get to 512 GB, they they are actually pretty fast; but still don’t match the Cobalts.

I just wish there were a decent non-S*ny option in the 128 GB range. Lexar has a bit of a bad reputation for reliability.
 
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Yeah and it gets really expensive when you buy the Gold first and cannot return it... Ask me how I know :LOL:

So true! When the specs came out for the R5, I looked at the max bitrates, an that's when I decided on the Cobalt, even though there were many "deals" for the gold and slower cards from other manufacturers. Right now, I don't intend on shooting 8k, but i like to know my media can support it if I want to try.
 
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SteveC

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Sep 3, 2019
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So true! When the specs came out for the R5, I looked at the max bitrates, an that's when I decided on the Cobalt, even though there were many "deals" for the gold and slower cards from other manufacturers. Right now, I don't intend on shooting 8k, but i like to know my media can support it if I want to try.

That's kind of where I'm at, but with one more added complication: Because I don't expect to get all that much use out of such things, I don't want to blow a thousand bucks on a card. (Besides if I manage to fill a 1TB card, I will have, in one fell swoop, added at least 30% to the amount of data I have stored. I can't do that too often!)

So I want a 128 GB card that works, and these companies make their small cards too slow.
 
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That's kind of where I'm at, but with one more added complication: Because I don't expect to get all that much use out of such things, I don't want to blow a thousand bucks on a card. (Besides if I manage to fill a 1TB card, I will have, in one fell swoop, added at least 30% to the amount of data I have stored. I can't do that too often!)

So I want a 128 GB card that works, and these companies make their small cards too slow.

I hear you; there are definitely some growing pains being at the leading edge of technology, and the R5 is at that edge. I've only really used a "fast" ProGrade UHS-II card with the R5 so far. I just got the CFexpress card, but I still don't have a reader (on backorder). I'm also waiting on the L-plate. Once I get those two pieces of equipment, then I expect to try some video.
 
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SteveC

R5
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Sep 3, 2019
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I hear you; there are definitely some growing pains being at the leading edge of technology, and the R5 is at that edge. I've only really used a "fast" ProGrade UHS-II card with the R5 so far. I just got the CFexpress card, but I still don't have a reader (on backorder). I'm also waiting on the L-plate. Once I get those two pieces of equipment, then I expect to try some video.

The reader I can buy locally, and will...but that shop has one card that's not fast enough... and S*ny. Whom I do not want to give one rusty zinc cent to.
 
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The reader I can buy locally, and will...but that shop has one card that's not fast enough... and S*ny. Whom I do not want to give one rusty zinc cent to.

I bought one of the highly regarded Sony Tough SD card (UHS-II). After about a year and a half, it started to corrupt files. Having an unspported DLP TV years ago was a big headache. Didn't think they could mess up SD cards... but then they had a large recall. Which is one reason why I've decided to use ProGrade exclusively.
 
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