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The Lexar Professional 1667x is a UHS-II SDXC card with 256GB capacity and rated read speeds up to 250MB/s. It is built for DSLR and mirrorless shooters who capture 4K video and burst photos, and it also works in UHS-I devices at their maximum speeds. Compared with UHS-I cards, it offers faster offloads when used with a UHS-II reader, but its write speed is lower than premium UHS-II cards. Reviewers generally find it reliable for the price, though some note slower in-camera write speeds and occasional card errors.
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Reviewers and owners generally find the Lexar Professional 1667x reliable and good value for 4K video and high-capacity storage. Many praise its read speeds when used with a UHS-II reader, but some criticise slower write speeds and occasional card errors.
The Lexar Professional 1667x 256GB SDXC UHS-II card is a memory card for capturing and transferring photos and video. It records 1080p Full-HD, 3D and 4K video and offers read transfer speeds up to 250MB/s (1667x).
It uses UHS-II technology and is rated UHS Speed Class 3 (U3). Its 256GB capacity lets you keep shooting longer without changing cards. It can be used in DSLRs, cinema-quality video cameras and 3D cameras.
The card is backward compatible with UHS-I devices and performs up to the maximum UHS-I speeds. In older, non-UHS-I devices, it performs at Class 10 speeds. Lexar designs its products with testing in the Lexar Quality Labs, which have more than 1,100 digital devices.
