Difference between SRAM and DRAM

SRAM and DRAM are two types of RAMs. SRAM i.e., static RAM is RAM in which data is stored in transistors in the form of voltage. DRAM i.e., dynamic RAM is RAM in which data is stored in capacitors in the form of electric charges. The SRAM is faster and expensive whereas DRAM is slower and less expensive. SRAM is used as cache memory whereas DRAM is used as main memory in computer systems. In this article, we will explore the difference between static RAM and dynamic RAM.

What is RAM?

RAM (Random Access Memory) is Computer Memory that is directly accessible by the CPU. RAM stores temporary data, that is in case of power loss, the stored information gets lost. It stores the data which is currently processing by the CPU. The data which is easily modifiable are generally stored in the RAM. RAM is of two types:

1. Static Random Access Memory (SRAM)
2. Dynamic Random Access Memory (DRAM)

Static Random Access Memory (SRAM)

Data is stored in transistors and requires a constant power flow. Because of the continuous power, SRAM doesn't need to be refreshed to remember the data being stored. SRAM is called static as no change or action i.e. refreshing is not needed to keep the data intact. It is used in cache memories. 

Characteristics of Static RAM

• Static RAM is much faster than DRAM.
• Static RAM takes less power to perform.

Advantages of Static RAM

• Static RAM has low power consumption.
• Static RAM has faster access speeds than DRAM.
• Static RAM helps in creating a speed-sensitive cache.

Disadvantages of Static RAM

• Static RAM has less memory capacity.
• Static RAM has high costs of manufacturing than DRAM.
• Static Ram comprises of more complex design.

Dynamic Random Access Memory (DRAM)

Data is stored in capacitors. Capacitors that store data in DRAM gradually discharge energy, no energy means the data has been lost. So, a periodic refresh of power is required in order to function. DRAM is called dynamic as constant change or action(change is continuously happening) i.e. refreshing is needed to keep the data intact. It is used to implement main memory. 

Characteristics of Dynamic RAM

• Dynamic RAM is slower in comparison to SRAM.
• Dynamic RAM is less costly than SRAM.
• Dynamic RAM has high power consumption.

Advantages of Dynamic RAM

• Dynamic RAM has Low costs of manufacturing than SRAM.
• Dynamic RAM has greater memory capacities.

Disadvantages of Dynamic RAM

• Dynamic RAM has a slow access speed.
• Dynamic RAM has high power consumption.
• Dynamic RAM data can be lost in case of Power Loss.

Difference Between Static RAM and Dynamic RAM

The table below represents the key difference between SRAM and DRAM.

Conclusion

From the above discussion we can conclude that SRAM and DRAM are two different types of RAMs. SRAM is static RAM that is faster, expensive and is used to implement cache. DRAM is dynamic RAM that is slower, less costly and is used to implement main memory. The major difference between SRAM and DRAM is that in SRAM bits are stored in the form of voltage whereas in DRAM bits are stored in the form of electric charges.