We have significantly updated our guide to the best CFexpress memory cards you can buy, which includes the results from testing multiple new options.
will update these results periodically as we obtain more cards, so make sure to bookmark this story and check back when you’re ready to make a purchase.To evaluate which cards performed best, we subjected each to a series of tests. In the case where a card manufacturer also supplies a card reader, we used paired those products together. If a company did not providewith a reader, tests were performed on the ProGrade Digital CFexpress Type B and SD UHS-II dual card reader.
and do so firing at the maximum 20 frames per second with the electronic shutter. This test was performed three times and the results were averaged.In this test, higher is better. Top performers here go to SanDisk, Exascend, and Lexar. While the Pergear Ultra kept up on the read speed front, it wasn’t very impressive when it came to write speed. Acer, OWC’s Atlas Pro, Angelbird, and Prograde’s Gold series cards performed the worst here, but with speeds that are by no means “bad.
Let’s get to the good news: every card we tested worked to our satisfaction when it comes to recording high-resolution video data. Every card, regardless of the speeds promised, was able to ingest 8K RAW video footage until the camera overheated, which means it’s highly unlikely that anyone would run into any issues with the cards when shooting in the field — the camera will fail before the card does.
That said, there may be a reason for that. Angelbird is extremely nitpicky about which cards are designed for which cameras which could mean that it does have some kind of special tuning to work with cameras better than with computer software. This seems like a stretch, but we have no way to tell.
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