Faster speeds to capture 4k2k hd video move to faster performance with kingstonrsquos sdhcsdxc uhs i u3 flash card with speeds of 90mbs read and 80mbs write it reads up to 9x faster and writes up to 8x faster than standard class 10 sd cards it meets the sd associationrsquos latest specification release uhs i u3 ultra high speed bus speed class 3 which guarantees performance of at least 30mbs and enough bandwidth to record and play back 4k2k video without interruption users can