SRAM (Static RAM) and DRAM (Dynamic RAM) are two types of RAM (Random Access Memory) used in computers and other electronic devices. They differ in design, performance, power consumption and usability.
SRAM (active RAM) .
- Considerations:
- Uses bistable latching circuitry made up of transistors to store each bit.
- You do not need to regenerate periodically as long as the power supply is available.
- Speed: .
- Faster than DRAM.
- Less usage, making it suitable for cache memory.
- Power Control: .
- Consumes less power in idle mode because it does not need to be regenerated.
- Consumes a lot of power while operating due to complex circuitry.
- Difficulty: .
- Low capacity compared to DRAM.
- Requiring more transistors per bit (usually six transistors per bit).
- Costs:
- Expensive to build.
- High cost per bit.
- Test: .
- Used in CPU cache, GPU cache, and other high-speed applications where speed is critical.
DRAM (dynamic RAM) .
- Considerations:
- Each bit is stored in a small capacitor in the integrated circuit.
- Periodic refresh is needed to maintain the data when the capacitors leak charge.
- Speed: .
- Slower than SRAM.
- Versatility, suitable for main system memory with high capacity requirements.
- Power Control: .
- Consumes more power in idle mode due to refresh requirements.
- Generally, the active power consumption is lower compared to SRAM.
- Difficulty: .
- Higher density compared to SRAM.
- Few transistors are needed per bit (usually one transistor and one capacitor per bit).
- Costs:
- Building is cheap.
- Less for each bit.
- Test:
- Used as main memory (RAM) in computers and other devices with high memory capacity
