I got a few new cards so I did a new test. My new Transcend cards 400x which are UDMA 7 cards today are a lot faster than the UDMA 6 version of the 400x card. Both Transcend and Sandisk have updated their cards from UDMA 6 to 7 without saying anything. And the new cards that look the same except the 7 or the Video Performance Guarantee (VPG) pic.
It's 30 sec shooting with RAW in my Canon 1D4. All settings are the same of course. But this time I had the lens on MF and also the camera in M settings to get everything exactly the same. I will do the same test with a 1DX when I buy that body.
ISO 100
1/4000 sec
f/5,6
lens EF 24L
Gitzo tripod RRS head
Conclusion: UDMA 7 cards are improved a lot. And there is a huge speed increase when comparing them against the same older card with UDMA 6. Even when the makers have the same speed on the card.
I still have an old USB 2.0 card reader. Would you know if the new UDMA 7 cards can be read by USB 2.0?
(I read a review on a Lexar 1000X saying that it needs a USB 3.0 reader?)
I see Lexar 400X (also 1000X but I don't think I need it) on sale and was ready to buy some. It seems from what you said that these are UDMA 7 now, is that correct?
Also, I have Vosonic 8860 viewer that has a built-in card reader slot? Would this continue to work?
yes they can but they will be read at a lower speed per the xfr capability of the reader itself.
the 1000X needs a USB3 reader to attain maximum xfr performance results. that does not mean it won't work on a USB2 reader unless its manufacturer put artificial limits on it.
I still have an old USB 2.0 card reader. Would you know if the new UDMA 7 cards can be read by USB 2.0?
(I read a review on a Lexar 1000X saying that it needs a USB 3.0 reader?)
I see Lexar 400X (also 1000X but I don't think I need it) on sale and was ready to buy some. It seems from what you said that these are UDMA 7 now, is that correct?
Also, I have Vosonic 8860 viewer that has a built-in card reader slot? Would this continue to work?
sjms wrote:
yes they can but they will be read at a lower speed per the xfr capability of the reader itself.
the 1000X needs a USB3 reader to attain maximum xfr performance results. that does not mean it won't work on a USB2 reader unless its manufacturer put artificial limits on it.
The two Transcend 64GB UDMA 7 600x cards that I bought after your first thread are still looking pretty good! They're getting lots of use here in Utah.
jcolwell wrote:
The two Transcend 64GB UDMA 7 600x cards that I bought after your first thread are still looking pretty good! They're getting lots of use here in Utah.
Thanks Lars!
I also own two of those 64GB cards Jim. They will be perfect when I buy the 1X
sjms wrote:
yes they can but they will be read at a lower speed per the xfr capability of the reader itself.
the 1000X needs a USB3 reader to attain maximum xfr performance results. that does not mean it won't work on a USB2 reader unless its manufacturer put artificial limits on it.
I recently bought a couple Lexar 1000x 32GB CF cards. My old Lexar Professional USB 2.0 CF/SD reader would fail and/or corrupt image files when trying to read the 1000x cards. Never had a problem with any brand of slower cards. I contacted Lexar and they indicated that there was a compatibility problem. I was able to read the 1000x card on an old cheapie all-in-one USB 2.0 card reader. Since I wanted faster upload speeds, I sprang for the Lexar USB 3.0 read, and it seems to read the new cards fine.
