UDMA 7 CF Card Performance on Canon 5D Mark III and 1D Mark IV – Soooo worth it!

Now that UDMA 7 card prices are coming down out of the stratosphere I figured it was a good time to pick up some newer/faster cards to replace my aging UDMA 6 media. It also didn't hurt that my Canon 5D Mark III supported the UDMA 7 standard – so I was eager to see if there would be any noticeable upside to the swap.  As I was heading over to a local Austin Thursday night bicycle race at The Driveway, I thought I'd recalled that the Canon 1D Mark IV also might support UDMA 7.

So after parking and prepping my gear, a quick search on my phone showed that the latest firmware upgrade "Improves writing/reading speeds when using UDMA 7-compatible CF cards."  Being fairly diligent about applying new firmware, I figured I'd be good to go – that I'd be able to test both the 5D3 and the 1D4 with UDMA 6 vs UDMA 7…  No dice… my 1D4 was at 1.0.8… D'oh!

Oh well – I figured I still had the 5D3 to play with, so I headed out to shoot; and boy did it help. I was noticing roughly double the shots when I just kept the shutter down and let it shoot – but perhaps more importantly, the time to clear the buffer dropped even more significantly – from 15 seconds to about 4 or 5.  Of course, all of this was with that super scientific timing method of "one one thousand… two one thousand…" LOL  I went ahead and tested the 1D4 as well – curious to see if the firmware would make any difference. The quick tests seemed to indicate that when using firmware 1.0.8 on the 1D4 that there was no gain in performance.

Back at the house, I went and did a bit more "scientific" testing. Yup – broke out the stopwatch feature on my cell phone.  I didn't quite feel like getting out the recorder, then looking at and counting the spikes in the wave image. I figured this was an "area play" of sorts – split seconds wouldn't matter, it was the larger changes that would be very noticeable that would be important to me (and hopefully, you).

I also went ahead and upgraded the firmware in my 1D4 to 1.1.1 to see if that made any difference. Since the testing on the 1.0.8 showed zero improvement (both out at the event, and in my "scientific" testing) I didn't include it in the results below; but yes – 1.1.1 DOES make a difference.

Both my 5D3 and 1D4 are set to just shoot raw files; I only save to one card (the CF) and when it is full, they roll to the SD till I can swap the CF card during a break in the shoot. To avoid AF or exposure settings delaying shutter speed, I went to manual focus, and set the camera to manual mode – 1/500 @ f/4. To test – I held the shutter down until I heard a hesitation in the shutter speed; when that happened, I started the time as I released the shutter, then watched to see when the red "writing" light went out. The same cards were used in both cameras: UDMA 6 – RiData 533x; UDMA 7 – Lexar Professional 1000x 16 GB.  I did three runs of each camera/setup and have averaged the runs. (okay – I know I'm not proving a Doctorial Thesis, but I know folks like to understand the details <chuckle>) Oh – one last nugget of data – when you look through the viewfinder and see the "available shots in buffer" indicated – neither camera's number changed when switching between card speed/technology. The 5D3 showed 13 shots for both cards and the 1D4 showed 23 shots for both cards.

A drumroll please… 

Camera Card  Shots till full   Buffer empty in 
 5D Mark III   UDMA 6  15  15.2 sec 
   UDMA 7 26  3.5 sec 
       
 1D Mark IV  UDMA 6 27  24.5 sec 
   UDMA 7 31  6.1 sec 

Ta da!

So – on the 5D3:

  • roughly 70% more shots on the before the buffer is full
  • buffer fully cleared in roughly 1/4 the time

and on the 1D4:

  • Only a slight gain in shots – 15% more, but again the
  • buffer fully cleared in roughly 1/4 the time

So that is the "numerical" side of things – the practical side of things is that it is very noticeable how much faster I can shoot again – primarily on the 1D4 (mainly because I do more of the rapid high speed shooting on it, but I'm doing more with the 5D3 as well).  It takes 6.1 seconds to completely empty the buffer, but even a 1/2 – 1 second stopping in the shooting can get me a quick burst of another 3-5 shots… a lot more manageable than the older 1.0.8 or UDMA 6 performance of only 1-2 shots after that 1/2 – 1 second hesitation.

So – run, don't walk – to your local retailer or web storefront and load up on some UDMA 7 greatness early and often!

If you have any questions, either comment below or use the "contact" link in the header.

Thanks, as always, for reading!

- Will

 

3 thoughts on “UDMA 7 CF Card Performance on Canon 5D Mark III and 1D Mark IV – Soooo worth it!”

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>