Yes, the Canon EOS R6 Mark II is compatible with the Lexar Professional 1667x 64GB SD.
Lexar 1667x writes at 120 MB/s. Canon R6 Mark II 4K60 minimum is 60 MB/s (Video Speed Class V60), not 200 -- corrected 2026-06-20 after a class-label mistranslation bug. 120 MB/s clears the real requirement by 60 MB/s.
“IPB (Standard) UHS Speed Class 3 or higher Video Speed Class V60 or higher -- Canon EOS R6 Mark II 4K UHD 59.94/50.00 fps card performance requirement.”
Last verified:
Confidence: inferred