10 Differences Between static ram and dynamic ram

Static RAM (SRAM)

Static RAM, or SRAM, is a type of random-access memory (RAM) that stores each bit of data in a flip-flop circuit, making it non-volatile when power is removed. This allows for fast access to data, as the flip-flop circuits can retain their state indefinitely as long as power is supplied.

Examples of Static RAM

Some examples of Static RAM include:
– Cache memory in CPUs
– Register files in CPUs
– Buffer storage in networking devices
– Solid State Drives (SSDs)
– Graphic Cards

Uses of Static RAM

Static RAM has various uses in modern technology, including:
– CPU cache: It is used to store frequently accessed information for faster retrieval.
– Register files: They store temporary data during arithmetic and logic operations within a CPU.
– Buffer storage: It helps in temporarily holding data in networking devices to regulate data flow between two different devices.
– Solid-State Drives (SSDs): The SRAM in SSDs helps in temporarily storing the data being read from or written to the NAND flash memory.
– Graphic Cards: Static RAM is used in the video memory of graphic cards to store the display data for rendering images and videos.

Dynamic RAM (DRAM)

Dynamic RAM, or DRAM, is another type of random-access memory that stores each bit of data in a separate capacitor within an integrated circuit. Unlike SRAM, DRAM requires constant power supply to refresh the data stored in the capacitors, making it volatile.

Examples of Dynamic RAM

Examples of Dynamic RAM include:
– Main system memory in computers
– Mobile phone RAM
– Tablet RAM
– Game console RAM
– Digital camera RAM

Uses of Dynamic RAM

Dynamic RAM finds extensive use in various devices, serving as the main system memory. Some common uses of DRAM are:
– Main system memory: It is the primary memory in computers used for temporary data storage and quick access.
– Mobile phone RAM: DRAM allocates memory for running applications and storing data temporarily in mobile devices.
– Tablet RAM: Like mobile phones, tablets require DRAM for multitasking and smooth operation.
– Game console RAM: RAM in game consoles allows for quick loading and running of game applications.
– Digital camera RAM: It helps in buffering images before they are saved to the memory card.

Differences Table

Difference Area Static RAM (SRAM) Dynamic RAM (DRAM)
Volatile vs Non-volatile Non-volatile Volatile
Storage Method Stores each bit in a flip-flop circuit Stores each bit in a separate capacitor
Power Consumption Higher power consumption due to flip-flop circuitry Lower power consumption
Data Refresh No data refresh required Requires constant data refresh
Access Time Lower access time (faster) Higher access time (slower)
Storage Density Lower storage density Higher storage density
Cost Higher cost per bit Lower cost per bit
Usage Primarily used in cache, registers, and small memory sizes Main system memory for computers and larger memory sizes
Stability More stable, no need for frequent refresh Less stable, requires constant refresh
Operating Temperature Can operate in a wider temperature range Sensitive to higher temperatures


In conclusion, Static RAM (SRAM) and Dynamic RAM (DRAM) are two different types of random-access memory with distinct characteristics. SRAM is non-volatile, faster, but more expensive and used in smaller memory sizes, while DRAM is volatile, slower, cheaper, and used as the primary system memory in computers and other devices.

People Also Ask

1. What is the difference between SRAM and DRAM?
SRAM is non-volatile, faster, and used in smaller memory sizes, while DRAM is volatile, slower, and used as the primary system memory for computers and devices requiring larger memory sizes.

2. Which is better: SRAM or DRAM?
The choice between SRAM and DRAM depends on the specific application. SRAM offers faster access but is more expensive, while DRAM provides higher storage density at a lower cost.

3. Why is SRAM more expensive than DRAM?
SRAM is more expensive than DRAM primarily due to its higher manufacturing cost and lower storage density per chip.

4. Can SRAM be used as main memory?
While it is technically possible to use SRAM as main memory, the cost and typical characteristics of SRAM make it impractical for large memory sizes. DRAM is more suitable as main memory.

5. Is DRAM used in cache memory?
No, cache memory primarily uses SRAM due to its fast access times, even though it is more expensive compared to DRAM.

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