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W.hen it comes to speed, nothing beats CFexpress when it comes to memory cards. As the name suggests, with built-in PCI Express technology. The cards were instantly faster than all other memory cards for digital cameras, but unfortunately also very expensive. The Transcend CFexpress 820 turns out to be significantly cheaper – and without any major compromises in speed, as the practical test shows.
CFexpress is extremely fast
Fast USB sockets are a must
When transferring photos and videos to the computer, the reader belongs to one fast USB socket – everything under USB 3.1 Gen2 or USB 3.2 Gen2 (data transfer up to 10 gigabits per second) slows down the pace significantly: with USB 3.1 Gen1 (maximum 5 gigabits per second) the Transcend CFexpress 820 only has a good 400 megabytes per second. This is still faster than all other current cards (SD UHS-II, XQD), but only half as fast as with USB 3.1 Gen2. For the full speed of the CFexpress 820, a socket with USB 3.2 Gen2x2 or USB 4 with up to 20 gigabits per second would be necessary – unfortunately there are no suitable readers for this yet.
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CFexpress: There is (maybe) more to come
Memory cards in size comparison: CFexpress type B (left) is slightly larger, CFexpress type A (right) slightly smaller than an SD card.
Transcend CFexpress 820: Conclusion of the practice test
Anyone who has been deterred by the high prices of CFexpress cards so far will get the Transcend CFexpress 820 a real alternative: significantly cheaper than many competitors, but still top in terms of speed. SD cards are no competition for the Transcend: The CFexpress 820 is up to four times faster than the fastest SD models and it also clearly outperforms the older XQD cards with up to three times the speed.
* The cheapest price may now be higher.
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