Dynamic random access memory (DRAM) is a type of random access memory that stores each bit of data in a separate capacitor within an integrated circuit. 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.

mem_ddr2sdr_category.jpg DDR2 SDRAM
240-Pin DDR2 SDRAM System Memory
RAM-DDR3-category.jpg DDR3 SDRAM
240-Pin DDR3 SDRAM System Memory
MEM-DDR4-subcategory.jpg DDR4 SDRAM
DDR4 SDRAM System Memory
mem_sodimm_category.jpg DDR3 SODIMM
DDR3 SO-DIMM System Memory
DDR3L-SODIMM-category.jpg DDR3 SODIMM Low Power
DDR3 SO-DIMM Low Power System Memory