Or so they say. While we've written about our fair share of SD cards in the past, it's the SDXC cards we've got our eyes on now. Last card we reported on with the kind of size and speed this Delkin card is reporting on was the Lexar set, one of them at 128GB and the other at 64GB. Why in the world would I want this newer Delkin ELITE633 card with less than the most storage in the world on it? Because it's the fastest! This card is able to record at speeds up to 45 megabytes per second and read at speeds up to 95 megabytes per second.