SanDisk is now producing Flash memory cards with four bits of data in each memory cell — twice as many as in conventional multi-level cell (MLC) NAND (2-bits-per-cell) memory chips. With X4 technology, the 64GB NAND Flash chip is the highest-density single-die memory device on the market. SanDisk is currently producing 8GB and 16GB SDHC cards as well as 8GB and 16GB Memory Stick PRO Duo cards using X4 technology.

SanDisk’s new Multi-Level Cell and advanced controller technology have allowed it to quadruple the capacity of its high-speed SanDisk Ultra II cards. The company now offers 8GB CompactFlash Type I cards, 4GB SanDisk Ultra II Memory Stick PRO cards and 2GB SanDisk Ultra II SD cards. All cards maintain their minimum write speeds of 9MB per second and minimum read speeds of 10MB per second...