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Hi : ) !!! - Sandisk Ultra vs. Sandisk Extreme!

I

igmolinav

macrumors 65816
Original poster
Aug 15, 2005
1,121
4
Hi,

The Sony A7ii video characteristics are as follows:

Video Format XAVC S
1920 x 1080p / 60 fps (50 Mbps)
1920 x 1080p / 30 fps (50 Mbps)
1920 x 1080p / 24 fps (50 Mbps)
AVCHD
1920 x 1080p / 60 fps (28 Mbps)
1920 x 1080i / 60 fps (24 Mbps)
1920 x 1080i / 60 fps (17 Mbps)
AVCHD
1920 x 1080p / 24 fps (24 Mbps)
1920 x 1080p / 24 fps (17 Mbps)
MP4
1440 x 1080 / 30 fps (12 Mbps)
640 x 480 / 30 fps (3 Mbps)


Are the quantities in the parentheses, given in 'Mbps', the speeds that the camera writes into the SD card??

Is a Sandisk Ultra SD Card fast enough for this camera? The write speed of this card is a Minimum of 10 Mbps, as the specs here say:
http://www.bhphotovideo.com/c/produ...unc_064g_gn6in_ultra_sd_64gb_card_80mb_s.html

Or does one need any of the two types of Sandisk Extreme SD cards shown here:

1. http://www.bhphotovideo.com/c/produ...DXPA_064G_A75_Extreme_Pro_64GB_SDHC_SDXC.html

2. http://www.bhphotovideo.com/c/produ..._sdsdxne_064g_gnci2_extreme_64gb_sdxc_u3.html


What is the big difference between the Sandisk Extreme SD Cards and the Sandisk Ultra SD Cards??

Thank you, kind regards,

igmolinav : ) !!!
 
My recommendation is to buy the fastest card possible. Memory cards are confusing as many manufactures list burst or peak read/write speeds. UHS-1 cards with a U3 classification should be at the top of your list. This will deliver about 30 MB/s transfer, great for RAW photos and video. For 50 Mbps video approx. 6 megabytes per second sustain speed is needed.
From your list this is my recommendation: http://www.bhphotovideo.com/c/produ..._sdsdxne_064g_gnci2_extreme_64gb_sdxc_u3.html
I use a similar 32 Gb card.
The Ultra Extreme Pro card would only benefit you if the goal is burst photography or quick upload to your computer.

As a side note, remember both the card reader and camera need to support a common standard to benefit from the speed.
 
Last edited:
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Extreme
  • Class 10 / UHS-I / U3
  • Max. Read Speed: 90 MB/s
  • Max. Write Speed: 40 MB/s
vs Ultra
  • Class 10 / UHS-I
  • Max. Read Speed: 80 MB/s
  • Min. Write Speed: 10 MB/s
Extreme seems to be a touch faster. The U3-1 feature (https://www.sdcard.org/consumers/speed/speed_class/) just means that they certify 10 MB/s as the min writing speed.

Make sure you have the correct units for speed. Mbps is 1/8 of MBps (Megabit vs Megabyte). 50 Mbps is 6.25 MBps and both cards will work.
 
Here's the sustained performance of an Extreme Card using built card USB 3 reader on the Mac.
 

Attachments

  • DiskSpeedTest Sandisk.png
    DiskSpeedTest Sandisk.png
    734.4 KB · Views: 498
Hi,

Thank you very much for your comments : ) !!!

Very kind regards,

igmolinv : ) !!!
 
I made the mistake if buying a very expensive Sandisk card that was a type above the recommended class for the camera. This results in issues and as a result it stays in a drawer while I happily use a cheaper, slower card with twice the capacity for a fraction ofmthe price. But one day, that old card will be useful!
 
I'm not sure what's wrong with my cards, if anything, but here's my results with two Sandisk Ultra cards. 2014 imac 5k card reader.

The slower one is a Sandisk Ultra 16 GB 30 MB/s.
The faster one is a Sandisk Ultra 32 GB 80 MB/s.

Bothe are class 10 cards. They don't seem to be UHS cards.
Since write speed is the critical factor, not read speed, perhaps you should go for the Ultra Extreme--or better yet, consult published benchmarks.
Screen Shot 14.png
Screen Shot 15.png


My hobby is still photography with a D7000, so the faster one of the two isn't limiting.
 
D7000 is the camera with which I had the card issues. Great features but hated the skintones so much.
 
No, nothing worked. I even tried lens filters. I had to do a lot more B&W work than usual because of this. I loved the tones on my D70s and D200 and couldn't be happier now I have all-Samsung primary gear. I felt I was losing important memories.
 
For the bottom card, use a camera to do the format and then try again.
If a card's gotten too many file writes and rewrites over time, it appear slower because the file system might actually cause extra writes for the metadata.

Also, if you run a benchmark utility on a card, for best performance always format the card using a camera before putting it back into service since benchmark utilities will apply that sort of bad writing pattern for their random IO tests.

jerwin said:
I'm not sure what's wrong with my cards, if anything, but here's my results with two Sandisk Ultra cards. 2014 imac 5k card reader.

The slower one is a Sandisk Ultra 16 GB 30 MB/s.
The faster one is a Sandisk Ultra 32 GB 80 MB/s.

Bothe are class 10 cards. They don't seem to be UHS cards.
Since write speed is the critical factor, not read speed, perhaps you should go for the Ultra Extreme--or better yet, consult published benchmarks.View attachment 607372View attachment 607373

My hobby is still photography with a D7000, so the faster one of the two isn't limiting.
Click to expand...
 
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