edit on 4-2-2012 by Infi8nity because: (no reason given)
Unlike most RAM, ReRAM is non-volatile memory, meaning that it retains data without power.
Current types of non-volatile memory, such as flash memory, are used in everything from USB sticks to solid state drives.
But while flash memory is faster than hard disk storage, it is still significantly slower than RAM, particularly when it comes to writing data. This makes it less suitable for the many processes involved in running programs.