Here's a breakdown:
* Double Data Rate (DDR): This refers to the technology that allows the memory to transfer data on both the rising and falling edges of the clock signal, effectively doubling the data transfer rate compared to older SDRAM (Single Data Rate).
* Synchronous (SDR): This means the memory operations are synchronized with a clock signal, ensuring data is transferred at precise intervals.
* Dynamic Random Access Memory (DRAM): This refers to the type of memory technology used. DRAM requires constant refreshing to maintain data integrity.
DDRAM is widely used in computer systems, including:
* Main memory (RAM): DDRAM is the primary type of memory used for storing programs and data that the CPU actively needs to access.
* Graphics memory (VRAM): Some graphics cards use DDRAM for storing textures and other graphical data.
There are different generations of DDRAM, each offering improved performance and features:
* DDR: The original DDR standard, released in 2000.
* DDR2: Introduced in 2003, with higher data transfer rates and lower power consumption.
* DDR3: Released in 2007, offering even higher speeds and efficiency.
* DDR4: Released in 2014, bringing significant performance improvements and power savings.
* DDR5: The latest generation, released in 2021, offering even faster speeds and higher capacities.
So, DDRAM refers to a specific type of DRAM with enhanced performance and efficiency through the use of double data rate technology.