Difference Between SRAM and DRAM – SRAM vs DRAM

Difference Between SRAM and DRAM

Difference Between SRAM and DRAM - Online Computer Study

Static Random-Access Memory (SRAM) and Dynamic Random-Access Memory (DRAM) are two fundamental types of computer memory used mainly in electronic devices e.g. Computers, Mobile, Smartwatches, Smart TV, etc. While they both serve the purpose of storing data for processing, they differ significantly in terms of structure, speed, power consumption, and use cases.

In this article, we will define the primary differences between SRAM and DRAM.

1. Storage Mechanism

SRAM: it uses flip-flops to store each bit of data in a stable state without needing constant refreshing. It keeps data as long as power is supplied, making it a type of volatile memory.

DRAM: it stores data as electrical charges in tiny capacitors within cells. These charges leak over time, requiring periodic refreshing, which makes DRAM dynamic and volatile.

2. Speed

SRAM: SRAM is faster than DRAM due to its simpler structure and direct access to data. It is commonly used for cache memory in CPUs, offering rapid data retrieval.

DRAM: DRAM is slower than SRAM because it needs to access data indirectly by addressing rows and columns in a memory array. This inactivity makes it suitable for main system memory rather than for fast data retrieval.

3. Size and Density

SRAM: SRAM cells are larger and require more transistors per bit, making them less space-efficient than DRAM. This limits its capacity, making it expensive for large storage applications.

DRAM: DRAM is more space-efficient, packing more data into a given area, and is thus preferred for applications requiring large amounts of memory.

4. Power Consumption:

SRAM: SRAM consumes more power than DRAM because it constantly needs power to maintain data integrity. This makes it less energy-efficient.

DRAM: DRAM is more power-efficient since it only requires significant power when data is read from or written to cells and during periodic refresh cycles.

5. Use Cases

SRAM: SRAM is used for high-speed cache memory in CPUs, graphics processors, and other applications that demand rapid access to data.

DRAM: DRAM is commonly used for system memory (RAM) in computers and mobile devices, where high capacity and cost-effectiveness are essential.


In summary, SRAM and DRAM are two essential memory technologies with definite characteristics. SRAM is faster, more power-hungry, and used for high-speed applications like cache memory.

DRAM, on the other hand, is slower but more cost-effective and space-efficient, making it suitable for main system memory in a wide range of electronic devices.

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