Hynix touts 'fastest' 512Mbit mobile DDR SDRAM

What is memory?
It is the computer's physical workspace that stores the instructions, programs and data needed to accomplish the tasks executed by the processor for some interval of time, even after electrical power to the computer is turned off.

What is SDRAM?
SDRAM means Synchronous DRAM, a type of solid state computer memory. SDRAM chips eliminate wait states because they are fast enough to be synchronized with the CPU's clock.