Komputerbay 1066x series just released

Started by pobox, April 11, 2014, 02:09:02 PM

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Hi there,

I just noticed komputerbay released 3 new cards @1066x, a 64GB, 128GB and a 256GB. They claim 155mb/s writing speed, which is faster then their 1200x card.

has anyone experience with this card sofar?


Logic would mandate that if they are just released, how could any have tried them yet?

Although I do believe someone on this forum actually "beta"-tested some of the cards prior to the official release.


Well, I got one - 1066x 128GB (really prefer 128GB for documentaries).

My stats for movie mode @ 1080P 24FPS:
85mb writing with not super consistent beginning (sometimes it skips frames, FAILED 150,  queued 1 as of testing it right now).

I really hoped for more, it gives me 115mb/s and 150mb/s in playback mode.

Debating if I should return it for a new one.

Any suggestions/ideas mates?


If It is faster than 1050x I would advise to check your settings thoroughly, chances are bigger that your problem lies there than on the card. Make sure your card is formatted in exfat and that, you activate large files xfat setting in raw/mlv menu. Also make sure you disabled all settings that take up buffer memory.

Note also that mlv might be more at the edge on being stable than raw rec.

Also have you benchmarked the card outside of the of the camera? If so what speeds on which reader do you reach there?


Yup, I checked everything.

I kept GLOBAL DRAW ON for focus peaking and framing. Writing is around 85mb/s, starting out with red/yellow and if it doesn't stop due to skipped frames in a few seconds, it will continue beyond 20+ minutes, 120+ GB. However, with failed/re-queued frames. I need sound, so it is mlv only, 10Apr revision.

I found throughout the forum, that the fastest 32GB Lexar cards can punch through 100mb/s, and 64GB Komputerbay on average can do almost the same. Thus, hoped to get into 90mb/s range, since it was designated with 155mb/s (I understand the caveat with KB cards). Just need to make a decision regarding that particular card.

My ultimate hope was for 1080P 30fps, albeit in spanning mode, but, apparently, card struggles with 1080P 24fps and spanning doesn't help a whole lot.


In my Kingston USB 3.0 CrystalDiskMark gave me 136 and 111 mb/s for reading and writing, correspondingly.


can anyone upload their benchmarks here (in movie mode 1920x1080 25fps and 24fps with mlv sound?)

in 25fps 1080p i get writing speeds in movie mode up to 91 mb/s with the 64gb 1000x kb card.
Hopefully the 1066x is faster!



Quote from: KMikhail on April 11, 2014, 08:18:20 PM
In my Kingston USB 3.0 CrystalDiskMark gave me 136 and 111 mb/s for reading and writing, correspondingly.

Interesting, in my experience you get stable 25p Raw rec with kb cards that benchmark 115mb write in CrystalDiskmark. Thats what my 64gb cards benchmark. My 256GB 1200x card is stable at 25p but haven't been able to benchmark that card in the same card reader because the kingston does not support 256gb cards...


Well, it is not good for me and I have contacted KB for a replacement. Though, their response was kind of strange - they didn't send me RMA# and form to fill out, just 'how we can help you'.


I don't get it, so the 1066X cards seem to yield the same exact results as the 1000X cards....what's the point?



I have been using the 1066x 128 GB Komputerbay CFs (I think I had three or four different ones) but the raw recording performance was even more inconsistent than with the 1000x I own. Quite disappointing, but you get what you pay for. I am working with SanDisk Extreme Pro 160 MB/s since two months and they're the first CFs that work reliably for 1080 25p acquisition. Interestingly, there is a performance difference between ExFAT and FAT, which is way more reliable.


Just to be precise about KB cards. I have had 6/7 of them and my main card is an old (june 2013) 128GB 1000x. With this one, I have consistent results, but there's some issue depending on parameters and fork I use. Sometimes, for what reason, it starts with a maxed 25-30MB/s for a while, and will become consistent after 30 seconds @ 65mb/s...

My point is that it depend on :

- first : space available on the card (fragmentation if you prefer)
- alignement of the partitions
- FAT type
- Card / DSLR / ambient temperatures
- ML release
- Parameters (liveview / modules loaded /  hacks etc etc) on ML

We can handle that there's some issues with recent Compact Flash, depending on UDMA controller and some USB card readers can definitively damage some cards (I got two 128GB deadly damaged with my old USB2 reader).


maybe you burnt this one too coz consistent speed @65 doesnt sound too right whatever the parameter lol those KB cards are building a career in ML forum...maybe ill w8 for the 1200 ones...for now i think the 1000s 64 are the most reliable and u wont get any better result with 1050,1066,1099
24-105mm f/4L _ 16-35mm f/2.8L II _ 50mm f/1.4 _ TS-E 90mm f/2.8 _ Sigma 70-200mm F2.8 EX


oh yes, I forgot: it depends on DSLR you're using... on 5D2, it's very difficult to get more than 65 with 128GB card... Some bench have been done last summer on 5D2, and the best buy for the bucks for the mk2, are the 64Gb 1000x because of internal controller limits. Even 1200x are limiting. (there's difference in crop mode where we can reach better bitrates)

I precise that 65 mb/s give me consistent results @ 2.20 format  (1880x854 24p continuous) As I don't use ML bench because for bitrates capabilities


I received the 64gb 1066x today, unfortunately it has the same benchmark as the 1000x
Same controller chip, it looks like only the sticker is diffrent.
Will send it back to amazon....


I just orderer an 128Gb 1066x and hope to reach the 64Gb's 1000x capabilities on 5D2 with this 1066x. In fact, I believe it depend heavily on the DSLR you use, maybe the difference on 5D3 will be more importante between 64 1000x & 1066x.


I tried 3x   128gb 1066x - all are about the same, pretty tightly.

Just installed 1.1.3 firmware and ML, it bumped up my writing rates by 2-3 mb/s (85-90mb/s, GD ON, movie). But 30fps 1080P with spanning still doesn't work (MLV).

Frames still get re-queued.


Quote from: KMikhail on April 18, 2014, 12:52:55 AM
I tried 3x   128gb 1066x - all are about the same, pretty tightly.

Just installed 1.1.3 firmware and ML, it bumped up my writing rates by 2-3 mb/s (85-90mb/s, GD ON, movie). But 30fps 1080P with spanning still doesn't work (MLV).

Frames still get re-queued.

You're on 5D3 ? Hope to reach 75-80Mb/s on 5D2 comparing to 65MB/s with my old 128Gb 1000x


Can you continous record 25fps 1080p with the 128gb 1066x?


sometimes i could, sometimes i could not, regardless of warm up. same went for 1920*1152 24fps.
i'll order 64 cards to see how they do.


Anyone tried the new 256Gb 1066x ? I contact KB support and they tell me the 256 is 5D2 compatible but I want to be shure there's no issue before ordering one (400$)


Im curious how the 1066x 256GB benchmarks vs the 1200x 256GB version. My 1200x 256 card has been very reliable and im wondering if there is any point of choosing the 1066x 256gb card over the 1200x which is cheeper...

KB TechSupport

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:


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.

Tech Support