Hynix unveils 512Mbit mobile DRAM chip

What is flash memory?
Flash is rewritable storage chip that holds content without power. Flash memory chips can either be NOR or NAND.

What is DRAM?
Dynamic random access memory (DRAM) is a type of random access memory that stores each bit of data in a separate capacitor within an IC. Since real capacitors leak charge, the information eventually fades unless the capacitor charge is refreshed periodically. Because of this refresh requirement, it is a dynamic memory as opposed to SRAM and other static memory. And unlike non-volatile firmware chips, both DRAM and SRAM lose their content when the power is turned off.