SD Card backup

I have a Transcend SD card, but I am trying to replace it with a faster card for my 5D Mark 3, but mainly for reliability. I am stuck choosing between a lexar 1000x or sandisk extreme pro 32 gb sd card. I know everyone has their opinions of which is better.

I have both brands for memory cards and I would say they are equally good.

yeah, I have a lot of respect for both brands. Really hard to choose one over the other.

Between these two cards, just buy the one you can find at the best price.

Only thing to consider is the SD slot on the 5D Mark III is quite a bit slower than the Compact Flash card slot. There is only a little value in buying an SD pro card for that camera over buying a card that is just a bit little slower.

In addition, I am going to buy a Fuji XT2 when it comes out. So, I could use extra speed possibly.

A few spec to consider:

Lexar 1000x 32GB is a UHS-II card. Sandisk Extreme Pro 32GB is a UHS-I card. USH-I has interface speed limit of 104MB/s. USH-II is in ~300 range. So if you also have a UHS-II card reader, Lexar 1000x will read faster than Sandisk Exteme Pro via card reader.

In terms of write speed, Sandisk has edge. Write speed is limited by the flash, not the interface. Lexar spec says 75MB/s. Sandisk is 90MB/s. You can only see this in card reader tho.

Inside 5D3, all these speed means nothing because 5D3 has SD interface limit of 25MB/s.

In term of reliability, Sandisk should have edge here because 32GB Extreme Pro uses SLC flash to achieve the 90MB/s write. Lexar's 1000x's 75MB/s can be achieved by MLC flash. When possible, flash manufacture will also use MLC because it is 1/2 the cost. SLC reliability >> MLC reliability from NAND flash point of view.

thanks for the the lovely information.

I vote for Samsung Pro+ sdxc

aznkid248 wrote in post #17991245
I have a Transcend SD card, but I am trying to replace it with a faster card for my 5D Mark 3, but mainly for reliability. I am stuck choosing between a lexar 1000x or sandisk extreme pro 32 gb sd card. I know everyone has their opinions of which is better.

Both cards are good, if you are going for lexar, then get the newer version 1066x or higher read / write speed.

eelnoraa wrote in post #17991338
Inside 5D3, all these speed means nothing because 5D3 has SD interface limit of 25MB/s.

Yeah, once I found that out, it made card choice much, much simpler.

Name brands and as much speed as you can afford. I generally stay two levels below the highest capacity.

If I could have voted for both, I would have.