Lexar 1066x on 7D2 speed.

I’ve just purchased one of these Lexar Professional 128GB 1066x Speed 160MB/s UDMA 7 CompactFlash Memory Card , I checked the speed with Crystalmark, I get about 160mb/s read and 70mb/s write. I was expecting similar write speed as read. I’m getting about 100shots raw @ 10fps in 30 seconds on the 7d2.

I get similar if not slightly faster with a Sandisk Extreme 120mb/s 65gb card.

I was wondering if this is correct and if other people experience similar speeds.

I don't know if any card or media writes as fast as it reads, in fact Lexar itself calims:
"Up to 160MB/s using the latest UDMA-7 protocol and a guaranteed continuous write speed of 65MB/s"

If you "checked the speed with Crystalmark" I have to assume that this is done on a test bed other than the 7D2 you mention in your thread title.

In which case, what you are testing with have little reflection on how the card will perform in the 7D2.

Check out actual performance in the 7D2 here;
https://www.cameramemo​ryspeed.com …st-sd-cf-card-comparison/

As it happens, two points of interest;

- The 7D2 makes much better use of this card than your test bed.

- That Lexar happens to be the fastest card tested in the 7D2. (although it's a virtual neck and neck vs. the fastest Sandisk)

ie: You done good with the correct card for your camera.

You likely have some form of bottleneck in your test system, preventing attaining full advantage of the cards speed, or a problem with the test methodology itself.

CyberDyneSystems wrote in post #18977697
I don't know if any card or media writes as fast as it reads, in fact Lexar itself calims:
"Up to 160MB/s using the latest UDMA-7 protocol and a guaranteed continuous write speed of 65MB/s"

If you "checked the speed with Crystalmark" I have to assume that this is done on a test bed other than the 7D2 you mention in your thread title.

In which case, what you are testing with have little reflection on how the card will perform in the 7D2.

Check out actual performance in the 7D2 here;
https://www.cameramemo​ryspeed.com …st-sd-cf-card-comparison/

As it happens, two points of interest;

- The 7D2 makes much better use of this card than your test bed.

- That Lexar happens to be the fastest card tested in the 7D2. (although it's a virtual neck and neck vs. the fastest Sandisk)

ie: You done good with the correct card for your camera.

You likely have some form of bottleneck in your test system, preventing attaining full advantage of the cards speed, or a problem with the test methodology itself.

Maybe I need to do a more thorough test, what I found odd in particular is the camera memory speed.com test on that card which showed similar write speed to read and the fact the Sandisk Extreme 120mb/s card showed similar results as the continuous high speed shooting test https://www.cameramemo​ryspeed.com …st-sd-cf-card-comparison/ ...... anyway, there’s probably a bottle neck on my old pc setup.

I stumbled across this video when trying to figure out if all these "sales" on SD cards were any good. It does shed some light on the speeds and classifications. I realize it deals with SD cards, by maybe it will help.

https://www.youtube.co​m/watch?v=ZlWhvc-UCOA

This test in 2014, specifically 7DII with both CF and SD memory, shows the Lexar 1066X 32GB CF as the fastest of the memory, and measured 102.9 MB/sec for write speed.

https://www.cameramemo​ryspeed.com …st-sd-cf-card-comparison/

This report in 2017 for the 7DII measured 138.4 MB/sec write speed for the 7DII and Lexar 1066X

https://alikgriffin.co​m …card-for-the-canon-7d-ii/

Lt Colonel wrote in post #18977756
I stumbled across this video when trying to figure out if all these "sales" on SD cards were any good. It does shed some light on the speeds and classifications. I realize it deals with SD cards, by maybe it will help.

https://www.youtube.co​m/watch?v=ZlWhvc-UCOA

Yes I've seen this a while back, of course, the readers make a lot of difference, I recently purchased this reader https://www.mymemory.c​o.uk …-card-reader-500mb-s.html which from testing doesn't seem to be any quicker than my old Lexar Pro 2 slot reader.

Wilt wrote in post #18977828
This test in 2014, specifically 7DII with both CF and SD memory, shows the Lexar 1066X 32GB CF as the fastest of the memory, and measured 102.9 Gb/sec for write speed.

https://www.cameramemo​ryspeed.com …st-sd-cf-card-comparison/

This report in 2017 for the 7DII measured 138.4 Gb/sec write speed for the 7DII and Lexar 1066X

https://alikgriffin.co​m …card-for-the-canon-7d-ii/

I've looked at the cameramemoryspeed test which is why I'm querying my test results, I can't achieve any more than 70mb/s writing to the card on my PC, the "continuous high shooting: 10 fps" I get similar results. Write speed obviously doesn't matter when transferring RAW files to PC but write speed to the camera does so I'm fairly happy but as I said in my initial message I get similar "continuous high shooting: 10 fps" results as my slow Sandisk Extreme 120mb/s 65gb card. In other words for real-world shooting, I've wasted my money buying the Lexar 1066x.

Perhaps the first sentence of the review at http://www.thessdrevie​w.com …compactflash-card-review/ says it all.

NickR wrote in post #18977974
Yes I've seen this a while back, of course, the readers make a lot of difference, I recently purchased this reader https://www.mymemory.c​o.uk …-card-reader-500mb-s.html which from testing doesn't seem to be any quicker than my old Lexar Pro 2 slot reader.

I've looked at the cameramemoryspeed test which is why I'm querying my test results, I can't achieve any more than 70mb/s writing to the card on my PC, the "continuous high shooting: 10 fps" I get similar results. Write speed obviously doesn't matter when transferring RAW files to PC but write speed to the camera does so I'm fairly happy but as I said in my initial message I get similar "continuous high shooting: 10 fps" results as my slow Sandisk Extreme 120mb/s 65gb card. In other words for real-world shooting, I've wasted my money buying the Lexar 1066x.

Wait-a-sec... you are trying to compare apples and oranges. The write speed of the CF card inside your CAMERA is very different than the write speed of the same CF card inside your PC!

Yes, Canon dSLRs have been somewhat pokey due to I/O processor limitations, and gotten flack about that performance when new faster memory appears on the market.
OTOH, performance in the PC can limit the throughput of the data to/from your CF card, too...do you have a recent PC with USB 3.1 support? If not, the USB 2 port will limit speeds to/from the CF.
Do you have a memory card reader with USB 3.1 support? If not, the USB 2 reader will limit speeds to/from the CF. Make sure you know what bottlenecks in your equipment -- your PC, and your camera -- exist before blaming the RAM for underperforming! NOTHING is faster than the slowest bottleneck.

Now I need to read about your lexar-multi-card-25-in-1-usb-3-0-card-reader, to see if there are impartial reviews showing its speed.
Interesting...one test says,

"From my tests, the white one that isn’t marketed as the professional model actually performs a little better. It accepts more types of memory cards. It’s also cheaper. If you’re trying to choose between them, the only reason I can find to go with the so-called professional model is if the device’s size is a critical consideration."

But maybe what explains the discrepancy between 'up to 500MB/sec' and your measured speeds are the fact that Lexar's claims are

• The Lexar can transfer data from more than one card at a time. In addition, it can transfer data between cards.
  
• Works at speeds up to 500 MB/second.
  

1. the memory-tp-memory transfer speeds, but speeds thru the USB port are more severely limited
   
2. the kind of memory you are using (e.g. SD) is significant contributor to limiting data transfer than would be achieved with another type (i.e. CF)
   

"Our recommended solution is to download and install the Lexar Driver Update and Repair Tool. This tool has been designed to diagnose and repair specific Lexar driver issues while simultaneously increasing system performance, optimizing memory, removing malware, improving security and fine tuning your PC for maximum reliability.
Advanced System Repair performs an in-depth scan of your entire system and all devices attached to it and verifies that you have the latest and most compatible drivers installed. It determines which drivers are missing, corrupt or obsolete.
After the initial scan, Advanced System Repair matches your device with the latest and most up to date version of your drivers by scanning its 26 million drivers database.
Lastly, Advanced System Repair downloads all the files required from its content delivery network and installs the drivers for you. Your drivers are now up to date and your device should now be functioning properly.

"

Wilt wrote in post #18978020
Wait-a-sec... you are trying to compare apples and oranges. The write speed of the CF card inside your CAMERA is very different than the write speed of the same CF card inside your PC!

Yes, Canon dSLRs have been somewhat pokey due to I/O processor limitations, and gotten flack about that performance when new faster memory appears on the market.
OTOH, performance in the PC can limit the throughput of the data to/from your CF card, too...do you have a recent PC with USB 3.1 support? If not, the USB 2 port will limit speeds to/from the CF.
Do you have a memory card reader with USB 3.1 support? If not, the USB 2 reader will limit speeds to/from the CF. Make sure you know what bottlenecks in your equipment -- your PC, and your camera -- exist before blaming the RAM for underperforming! NOTHING is faster than the slowest bottleneck.

Now I need to read about your lexar-multi-card-25-in-1-usb-3-0-card-reader, to see if there are impartial reviews showing its speed.
Interesting...one test says,

"From my tests, the white one that isn’t marketed as the professional model actually performs a little better. It accepts more types of memory cards. It’s also cheaper. If you’re trying to choose between them, the only reason I can find to go with the so-called professional model is if the device’s size is a critical consideration."

But maybe what explains the discrepancy between 'up to 500MB/sec' and your measured speeds are the fact that Lexar's claims are

• The Lexar can transfer data from more than one card at a time. In addition, it can transfer data between cards.
  
• Works at speeds up to 500 MB/second.
  

So the 500MB/sec limit might be

1. the memory-tp-memory transfer speeds, but speeds thru the USB port are more severely limited
   
2. the kind of memory you are using (e.g. SD) is significant contributor to limiting data transfer than would be achieved with another type (i.e. CF)
   

Or you might have driver-imposed limitations in the reader's performance...from Lexar:

"Our recommended solution is to download and install the Lexar Driver Update and Repair Tool. This tool has been designed to diagnose and repair specific Lexar driver issues while simultaneously increasing system performance, optimizing memory, removing malware, improving security and fine tuning your PC for maximum reliability.
Advanced System Repair performs an in-depth scan of your entire system and all devices attached to it and verifies that you have the latest and most compatible drivers installed. It determines which drivers are missing, corrupt or obsolete.
After the initial scan, Advanced System Repair matches your device with the latest and most up to date version of your drivers by scanning its 26 million drivers database.
Lastly, Advanced System Repair downloads all the files required from its content delivery network and installs the drivers for you. Your drivers are now up to date and your device should now be functioning properly.

"

yes, you are probably right, I have USB 3.0 if I was using USB 2.0 the speeds would be a 10th of what I'm getting. I've tried on my Desktop PC and Laptop which both have SSD's and quick RAM, I get the same test results from CrystalMark

All the tests I've seen for this card near enough have 1:1 read and right. Look anyway its the write speed from my camera to card that's import of course. I've done a few more bursts test and compared them with the findings for the 7D2 on Camera Memory Speed web site, I tried RAW+JPG, RAW and JPG .....all tests were similar.

I'm just scratching my head about the write speed from the computer to reader to card??? either there's a bottleneck there or the worst-case scenario is the card is a fake !!

I don't know what the last paragraph means, the software they advised installing is 3rd Party not windows, also the Lexar software cannot be found anyway. Have you a link to the Lexar Statement ?

NickR wrote in post #18978038
I'm just scratching my head about the write speed from the computer to reader to card??? either there's a bottleneck there or the worst-case scenario is the card is a fake !!

Just to confirm, are you using a USB 3.0 cable? Should have blue ends.

John from PA wrote in post #18978072
Just to confirm, are you using a USB 3.0 cable? Should have blue ends.

I use the cable that came with the reader which is USB 3.0

Here's my latest test, I can't figure this out why I'm not getting 120mb/s write speed, I get far faster write speed from the Sandisk Extreme? I've looked on Amazon.com in the reviews of the Lexar the reviewers are getting 130mb/s + . https://www.amazon.com …28CRBNA1066/dp/​B00IAYFDJG

Here's an image of the ATTO Test.

NickR wrote in post #18978610
Here's my latest test, I can't figure this out why I'm not getting 120mb/s write speed, I get far faster write speed from the Sandisk Extreme?

What was the source of your Lexar card? Could it be counterfeit?

Someone elsewhere that had a bad experience with a counterfeit Lexar card (same model & size as yours) made the statement “I won't name all the details so those scammers don't up their game but the most obvious detail is a counterfeit has a matte print, compared to a legit card which has gloss and textured surface.

John from PA wrote in post #18978648
What was the source of your Lexar card? Could it be counterfeit?

Someone elsewhere that had a bad experience with a counterfeit Lexar card (same model & size as yours) made the statement “I won't name all the details so those scammers don't up their game but the most obvious detail is a counterfeit has a matte print, compared to a legit card which has gloss and textured surface.

This is was what I was half thinking . although it seems too good for a fake ? Yes I have read that, I have written to the eBay seller so I’ll see what he comes back with. To me it looks quality, packaging etc was perfect, there’s a s/n on the card.

Write operations are ALWAYS slower than read operations.

While reading a device is only asking what it already has on-board,
writing takes more time for the device, even HDDs and SSDs.
It simply takes more time for a device to arrange incoming data
than it takes to dish it out. It's fact.

Read operations simply query the device to report what's already there,
while write operations tell the device to use itself for recording information.
Just as a video-cam or capture device is slower in recording than playback.

Any/all slowdowns in the rated figures can be attributed to whatever is
the slowest part of the process: camera, card-reader, cable, system BUS, etc.
If you're not on the absolute bleeding-edge of the technological spectrun
with literally everything, you won't realize the published transfer rates.

If the memory cards are working well for your own useage, I'd give up
on the folly of testing and re-testing.