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SRAM has many differences to Dynamic RAM (DRAM). The first of all is that for DRAMs, to keep the data that is stored from being lost, it has to be refreshed, by writing the same data to it over and over again with special circuitry, much like a pen that dispenses disappearing ink onto paper. The second difference is that SRAMs are also used for specific applications within the PC, where their strengths outweigh their weaknesses compared to DRAM.
Like other semiconductor chips, SRAM chips are made by Photolithography. For SRAM, each bit is composed of between four and six transistors, the parts that hold information, which is why SRAM takes up much more space compared to DRAM. To compare with SRAM, DRAM has only one transistor plus a capacitor acting like a miniature rechargeable battery).
Positive differences[change | edit source]
SRAM does not need to be refreshed, like words that have been written with a pencil on paper.
Changing Static RAM is also faster than DRAM.
Negative differences[change | edit source]
SRAM is more expensive than DRAM.
SRAMs take up much more space than DRAMs.