For random reads of 4K files, it reads at. Backward compatible with UHS-1 card readers (slows down to UHS-1 speeds). You may get close to this with large files if nothing else is choking your transfer. You can see the extra pins for UHS-2, that allow for higher transfer speed. From my WD Black 2TB SATA HDD, I can read 190MB/s sequential. Source: The sample of this product was provided by Alxum. If you want to see what your drives are doing on a windows PC, grab a benchmark tool like CrystalDiskMark. Based on that data we are adding the Silverstone FP37 card reader to our lineup. Providing flawless operation for the last 30 days, the Alxum CFexpress card reader simply does what it’s supposed to and does it well. Upon testing it with CrystalDiskMark we found that performance was virtually identical to the Koutech as well: read speeds of 68MB/s with the high speed CF card, 45MB/s with the SD card and write speeds at 65MB/s and 43MB/s, respectively. If using the internal card reader takes longer time, you can conclude that it is the bottleneck. Remember to tick the box in order to test also writing. a USB 3 adapter via a USB 3 port on the computer. (In most cases, the default selection is more than sufficient.) Step 4: Select the drive (HDD or SSD) you want to test. Let us rely on Disks alias gnome-disks and simply run it using. (If the default is 5, you can change it to 3, which should be enough to get more accurate results.) Step 3: Select the file size. The reader is plug and play, without any driver request. Step 1: Launch CrystalDiskMark to access its interface. First of all you need to download and install the CrystalDiskMark software on your computer. The Alxum CFexpress card reader is specially designed for photographers and videographers. The following article of will guide you to use CrystalDiskMark software to check the read and write speed of the HDD, SSD or USB hard drive, please follow along. ![]() What’s in the box Alxum CFexpress card reader 1ft USB-A to Type C cable 1ft. The positive clicking feedback helps indicate that the card is inserted correctly. The Alxum CFexpress card reader is a USB 3.1 Gen 2 10Gbps USB C to CFexpress Type B Memory Card Adapter. ![]() The slot for the CFexpress Type B Memory Card has a latching mechanism which I like. I also found that the transfer speed was almost identical via my USB 3.1 port. For the Type C connection, I found that using CrystalDiskMark, the best transfer speed on my laptop was 424.7 MB/s (3.3976 Gbps). The rated data transfer speed of 10Gbps will significantly depend on both the capability of your Type C port, the destination drive speed, and the overall capability of your computer to transfer data.
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