Wed 23-Jan-13 04:43 AM | edited Wed 23-Jan-13 04:47 AM by M_Jackson
I have been using a Sandisk Extreme Pro 90 MB/s UDMA 6 card in my D4. It's at the shop. I bought a D800 while its there and used the same card in the new camera. Last week, I ordered two Lexar 1000x UDMA 7 cards and used one of them for the first time today.
I tried importing the files from the 1000x cards into Lightroom via my old USB3 card reader. The first couple of files loaded fine, then the transfers slowed down to a snail's pace. The files were copied to a USB3 External 3 TB drive via a USB3 card added to my 64 Bit Windows system.
I did a few tests. When I connected an XQD reader directly to the USB 3 adapter and copied a bunch of files to the C drive, it copied at a rate of around 78 mb/s. The USB3 CF card reader transferred the files from the Sandisk Extreme Pro at around 35 MB/s at a consistent speed. When connected to either the internal C drive or the external USB 3 drive, the USB3 CF card reader the Lexar 1000x card started out at around 30 MG/s, then quickly slowed to around 12 MB/s. I stopped the transfers after it slowed to only 4.9 MB/s and only around 15 files. That makes me think I need a new Lexar USB3 CF card reader with the updated drivers to read USMA 7. I have no idea why it would slow down so drastically.
I also tried connecting the D800 directly to the computer via the USB3 adapter. While sending files to either the internal C drive or the external USB 3 drive, files transferred at a consistent speed throughout the transfer. Windows didn't display the speed in the dialog box, so I don't know exactly how fast they were transferring. It looked like around 2 seconds per 74,776k file...maybe 3 seconds.
The XQD file transfer confirmed the USB3 adapter card is working properly at USB3 speeds of around 75 MB/s. The old combo USB3 card reader is made by AdvanCED (purchased through Amazon) and has worked fine on the UDMA 6 cards.
Did everyone here buy a Lexar card reader with the updated firmware if they bought the Lexar 1000x cards?
Lastly, my old laptop is a Windows Vista machine. It only has a USB2 port. Would I need a new version of the Lexar CF card reader to copy files from the UDMA 7 cards at USB2 speed?