Static random-access memory
Both DRAM and SRAM store information in binary by using very small electronic components. Both are volatile (need electric current flowing to keep the negative and positive charged components stay that way).
For SRAM, each bit is composed of between four and six transistors, forming a flip-flop to hold information. This complexity is what makes SRAM bigger and more expensive than DRAM. In DRAM each bit has only one transistor plus a capacitor acting like a miniature rechargeable battery).
- SRAM does not need to be refreshed.
- Changing Static RAM is faster than DRAM.
- SRAM is more expensive than DRAM.
- SRAMs take up more space and electricity.