Lexar Professional USB 3.0 Dual-Slot USB Reader FAQ

I noticed the Lexar Professional USB 3.0 Dual-Slot Reader now supports UDMA 7. What does this mean?

Addressing the latest developments in technology, Lexar has updated its existing Lexar Professional USB 3.0 Dual-Slot Reader to include UDMA 7 support. This allows you to leverage the speed enhancements of the latest high-performance Lexar Professional CompactFlash cards for even faster file transfer. For older Lexar Professional USB 3.0 Dual-Slot Card Readers, a firmware download is essential for CF 1000x card functionality. The firmware download is located here.

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What is UDMA 7?

UDMA 7, which stands for Ultra Direct Mode Access 7, is the latest transfer mode under the UDMA interface. UDMA 7 allows a maximum transfer rate of up to 167MB/sec. This can be compared to the previous UDMA mode, UDMA 6, which allowed transfer rates of up to 133MB/sec.

Parameter

CF 4.1 Specification

CF 5 Specification

CF 6 Specification

Capacity

Up to 137GB

Up to 144PB

Up to 144PB

Measurable Speed

Up to 133MB/sec

Up to 133MB/sec

Up to 167MB/sec

UDMA mode

Up to UDMA 6

Up to UDMA 6

UDMA 7

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My laptop/desktop computer has USB 2.0 port; will it work with the Lexar® Professional USB 3.0 Dual-Slot Reader?

Yes, the reader is backwards compatible with USB 2.0 devices; however, the reader’s transfer speed will be reduced to 2.0 performance levels. You’ll need to connect the reader to a USB 3.0 device to maximize the performance capabilities of the reader.

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Do I need to install a driver before using the Lexar® Professional USB 3.0 Dual-Slot Reader?

If you’re using a computer with USB 3.0 port, you will need to install a USB 3.0 driver onto the computer. The driver should be provided by the system or adapter manufacturer. If you’re plugging into a USB 2.0 port, there’s no driver needed.

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I don’t see any performance difference between the Lexar® Professional USB 3.0 Dual-Slot Reader and my existing USB 2.0 reader. What should I do?

Performance may vary, depending on the read/write speed of the card and your system’s configuration. In order to experience the performance benefits of the Lexar Professional USB 3.0 Dual-Slot Reader, it must be plugged in to a USB 3.0 host device.

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What card formats does the reader support?

The Lexar® Professional USB 3.0 Dual-Slot Reader supports the latest UDMA CompactFlash® (CF), SDXC™ (not supported on all operating system platforms), and SD UHS-I (SD  3.0) memory cards. It’s also backwards compatible with all standard CF, SD™, and SDHC™ cards.

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Does the Lexar® Professional USB 3.0 Dual-slot Reader support all SDXC™ cards?

Yes, but before inserting the SDXC card into the reader, please make sure the operating system of your computer is compatible with SDXC cards and supports the exFAT file format.

View the SD Card Associations reference guide »

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What should I do if my computer can’t detect the reader?

Verify that the USB cable is properly connected to the USB port, and insert a card into the reader to see if the light flashes. If your computer still can’t detect the reader, please click on the “chat live” link at www.lexar.com/support or call the Lexar technical support hotline at (510) 413-1275 for further assistance.

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Does the reader work with a MAC® system?

Yes, the reader works with Mac OS 10+. However, we are aware of the compatibility issues users may be experiencing when trying to use the Lexar Professional USB 3.0 Dual-Slot Reader with the newest MacBooks, and we’re working diligently to provide a firmware upgrade in the near future.

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Does the reader work with Windows® operating systems?

Yes, the reader works with Windows 7, Vista™, and XP.

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