The Lexar Professional 1667x is a UHS-II SDXC card rated V60, U3 and Class 10, with up to 250 MB/s reads and 120 MB/s writes. Its 60 MB/s guaranteed minimum write speed covers 4K video and sustained burst shooting on most cameras. It is a sensible middle step between slower UHS-I cards and expensive V90 cards, and it suits hybrid shooters who want UHS-II speed without paying for the top tier. Buyers rate it highly and call it reliable, though it is not the fastest UHS-II card for high-bitrate 8K or deep RAW buffers.
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Owners rate the card highly and describe it as dependable for 4K video and burst stills, with speeds close to the quoted figures on UHS-II gear. Complaints are mostly about write speed falling short of pricier V90 cards and about needing a UHS-II reader to see the full speed.
The Lexar Pro SDXC 1667x is a 128GB UHS-II memory card rated V60, U3 and Class 10. It records Full HD, 3D and 4K video.
It reads at up to 250 MB/s and writes at up to 120 MB/s. The minimum write speed is 60 MB/s. A built-in write protect switch helps guard stored files, and downloadable Image Rescue software is available for recovering images.
