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Please try this if you have a UDMA7 compatible USB 3.0 reader:

How to check if the card is corrupted in Windows/Mac:
Download SD Formatter for Windows/Mac: (SDformatter works for all CF/SD/MicroSD cards)
https://www.sdcard.org/downloads/formatter_4/
If the software reports that the card is less than 64MB (not GB) then the card is corrupted  and is unrecoverable using card reader.
If the software reports that the card is more than 64MB (not GB) then the card is recoverable using card reader.
Please format it but click option >> format size option = on. The others you can leave at default.

Tech Support
Komputerbay

Please be aware that these 256GB cards require the latest firmwares on your camera and also your card reader - both of which can be updated.

EX: a 256GB card on a card readers with older firmware will read as a ~132GB card.

Tech Support
Komputerbay

We tested it on the 5DM2 a while back. This has been a non issue for quite some time.

Tech Support
Komputerbay

Attached benchmarks on the 256GB 1066X cards

Hello,

Yes - that is from the 256GB 1066X UDMA7 in playback mode.

To Benchmark you card properly for MAX speed compatible with ML:
1. Go to ML and turn OFF Global Draw
2. Do not test while LV is active, meaning not in video mode or photo with Live View Mode.  This is refereed to testing in Playback mode
3. Make sure your Camera Auto Power off is disabled in Canon menu.
4. Go to the ML menu and find the Debug menu and then the Benchmark, and select Card R/W benchmark (5min)
When the benchmark has finished ML will automatically record the bitmap image in your card.

Regards,

Tech Support
KB

Hello Folks,

We have recently had a lot of demand for the 256GB cards. Since the 1200X is always BO'd for 2-3 months - we were finally able launched the other versions of the 256GB cards. While the basic problem is still with being able to access the card outside the camera - we have had quite a bit of success with the 5DM2 and the 5DM3. You can check the benchmark:

http://ecx.images-amazon.com/images/I/91RVau1mlvL._SL1500_.jpg

It is bootable and we were able to achieve continuous on both the 5DM2 and the 5DM3 at 1920X1080 on the 5DM3.

The cards can only be read by a Lexar UDMA7 USB 3.0 Dual Slot, Transcend UDMA7 USB 3.0 reader and the Sandisk UDMA7 USB 3.0 reader. All others readers have not been updated to read 256GB cards. The other readers will format the card to a ~132GB card.

Regards,
Tech Support
KB

Hello,

We have fixed this issue and now have 128GB CF UDMA7 firmware bootable cards (both in 1000X and 1050X). (fixed 2 weeks back)

Please note that since this issue was just recently fixed - Amazon does not carry the most up to date stock on hand (Amazon USA has some on hand but the rest will start carrying this version by the early Nov 2013).

You can send the cards back to us:

Tech Support
Komputerbay
2150 Cedars RD 700
Lawrenceville GA 30043

along with your non bootable cards and also you shipping address and we will get it swapped for you.

These cards have already been tested on all Canon camera's that boot from the CF card for ML.

Regards,

Tech Support
Komputerbay

Out of curiosity, KB tech support, if the internals aren't broken lexars, what internals are the komputerbay cards sporting?

>>The main component which is Micron NAND. Some of our cards carry the same exact Micron NAND.

Also on the description of the 128GB 1050x it says it's write speed is the same as the 1000x cards. The only difference is that the read speed is faster. Is this true?

128GB 1000X V2 (basically anything that was shipped from USA since last week, UK since this week and DE/Fr/ES/IT this week is all V2)

is: 90~100MB/s Write and 150MB/s Read

128GB 1050X is 100~110MB/s Write and 160MB/s Read



We are looking at 120MB/s Write speeds cards (1200X) early next month on a trial basis. Mass production will be looked into once these pass the tests.

Sales team claims that the only method they will use to send to Asia is Fedex which is anywhere from US$ 50~100.00. We have quite a few customers using the eBay global ship program to send goods to Australia/Canada/NZ. If you have suggestions - you can email them at [email protected].

Hello Folks,

We have finally been given permission to talk on public forums on a trial basis. Please direct questions to [email protected] as we will not be able to reply back to the forums on a regular basis.

The 1050X is the fastest car that we have launched yet and has been confirmed to work on the 5DM3 for ML. You can achieve 1920X1080 @ 25fps without a problem. These are 5~9% faster than the 64GB 1000X.

We have seen some incompatibility with the 5DM2 (limited to FAT32 and bandwidth bottleneck of 67~72MB/s). We are working on this to see if these are users errors/camera limitation/card limitation. We will be talking to Ted later today to see if we can fix this issue. We reached out to 6 other users yesterday but they were not reachable.

We did reach out to 5DM3 users (this camera can use exFAT and can write 100MB/s) and some have already confirmed that they have used the card successfully.

The newer 1000X 128GB are the ones that Amazon has instock in USA. Basically anything that shipped from USA since this past Friday is the newer (V2) 128GB 1000X cards. They are just as fast as the 64GB 1000X cards. They will be in Europe by the 1st week of August.

Rumors: These are not QC failed Lexar cards. Some of our cards are made with the same components.

Fast/Slow cards: We have not been able to identify fast/slow cards yet. There is a card warmup required for some cards for them to work at their optimum speed (CF card design). Once they reach the optimum temp. - they work fine.

The best way to benchmark a card is on a UDMA 7 compatible USB 3.0 High Speed reader. We do not recommend firewire/USB 2.0/PCI Express as there are a lot of cases where people have lost their .raw files while transferring files. We recommend using CrystalDiskMark @ 4GB for PC and Blackmagic for Mac for speedtest. Please do not use h2testw for speedtest as their software has a bandwidth limitation however it is a good test for capacity checking.

Regards,

Tech Support
Komputerbay

Hello Folks,

We have finally been given permission to talk on public forums on a trial basis. Please direct questions to [email protected] as we will not be able to reply back to the forums on a regular basis.

The 1050X is the fastest car that we have launched yet and has been confirmed to work on the 5DM3 for ML. You can achieve 1920X1080 @ 25fps without a problem. These are 5~9% faster than the 64GB 1000X.

We have seen some incompatibility with the 5DM2 (limited to FAT32 and bandwidth bottleneck of 67~72MB/s). We are working on this to see if these are users errors/camera limitation/card limitation. We will be talking to Ted later today to see if we can fix this issue. We reached out to 6 other users yesterday but they were not reachable.

We did reach out to 5DM3 users (this camera can use exFAT and can write 100MB/s) and some have already confirmed that they have used the card successfully.

The newer 1000X 128GB are the ones that Amazon has instock in USA. Basically anything that shipped from USA since this past Friday is the newer (V2) 128GB 1000X cards. They are just as fast as the 64GB 1000X cards. They will be in Europe by the 1st week of August.

Rumors: These are not QC failed Lexar cards. Some of our cards are made with the same components.

Fast/Slow cards: We have not been able to identify fast/slow cards yet. There is a card warmup required for some cards for them to work at their optimum speed (CF card design). Once they reach the optimum temp. - they work fine.

The best way to benchmark a card is on a UDMA 7 compatible USB 3.0 High Speed reader. We do not recommend firewire/USB 2.0/PCI Express as there are a lot of cases where people have lost their .raw files while transferring files. We recommend using CrystalDiskMark @ 4GB for PC and Blackmagic for Mac for speedtest. Please do not use h2testw for speedtest as their software has a bandwidth limitation however it is a good test for capacity checking.

Regards,

Tech Support
Komputerbay