
I did a real test. I tested this with the USB-C port on the back of the motherboard. I tested this with the following three devices: _________________1. USB-C to USB-C Cable, Rampow [100W, USB 3.2 Gen 2X2] https://www.amazon.com/gp/product/B0827CR8GWThis USB-C to USB-C cable is listed as: Maximum speed: 20 Gb/s Read or record or both speeds? I don't know ____________________ 2. ProGrade Digital Memory Card - CFexpress Type B (256GB card) https://www.amazon.com/gp/product/B0863981FZ 256GB card listed as: Max read speed: 1700MB/ s Maximum write speed: 1400 MB/s with ____________________3. CFexpress Type B and SD 4.0 UHS-II Card Reader with Dual USB 3.2 Gen 2 10 Gbps https://www.amazon.com/gp/product/B08RF1QBTN : 5000 megabits per second, 10000 megabits per second" ____________________ TEST: I have Transferred 214 Nikon Z6ii raw files and some short MP4 videos from a CF card directly to my PC desktop (with M.2 drive SSD Gen 3) via a card reader and using a USB-C to USB-C -Cable. ____________________ RESULTS: IT'S FAST! I've seen transfer speeds of over 600MB/s I think it reached its MAXIMUM at around 630MB/s But when I took a screenshot the speed jumped from 500MB/s s up and down to 630MB/s. Somewhere somewhere. So when I took the screenshot the speed was 590Mbps. 20Gbps? Nowhere near BUT it was still REALLY fast. In front of my Nikon Z6ii -Upgrade I recorded with a Nikon D750 and an SD card with 95 MB/s The difference is HUGE. someone took a screenshot with a read/write speed over 900MB/s. So the problem is either the USB-C cable or the CF card. MAYBE it's just the USB-C port on my motherboard not using its MAXIMUM potential. Most likely a problem with my USB-C port? (I don't know) ____________________ CONCLUSION: I doubt you'll get 20 Gbps. But it's still ridiculously fast. If you are a photographer/videographer who needs to quickly transfer files to a computer to get started with the files. This is a good attitude. With this setup, my entire photography workflow becomes much faster. The only bottleneck I currently have is Adobe Lightroom, which can be ridiculously slow. But I recommend this setting for photographic purposes. Get a CF card if your camera supports it. The card reader can also read faster SD cards (UHS-II). The card reader also comes with short USB cables for easy portability, but I bought a longer USB cable to keep it connected to my desktop PC at home. Pro Grade sells its own card reader, which costs more. There's a chance you could see even faster file transfer speeds with a Pro Grade card reader. But this card reader and setup is more than fast enough. Remember that the USB ports on the back of a PC are usually always the fastest compared to the front USB ports. Because I can't get to top speed. There is no point in paying for a faster card reader. So I'm very happy with this setup. I recommend it.

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