SRAM(Static Random Assessable Memory)-where the word static indicates that it, does not need to be periodically refreshed, as SRAM uses bistable latching circuitry (i.e., flip-flops) to store each bit. Each bit is stored as a voltage.Each memory cell requires six transistors,thus giving chip low density but high speed.However, SRAM is still volatilein the (conventional) sense that data is lost when powered down.
Disadvantages are more expensive and also consumes more power than DRAM.
In high speed processors (such as Pentium), SRAM is known as cache memory and is included on the processor chip.However high-speed cache memory is also included external to the processor to improve total performance.
DRAM(Dynamic Random Assessable Memory)- Its advantage over SRAM is its structural simplicity: only one transistor (MOSFET gates) and a capacitor (to store a bit as a charge) are required per bit, compared to six transistors in SRAM. This allows DRAM to reach very high density.Also it consumes less power and is even cheaper than SRAM (except when the system size is less than 8 K) .
But the disadvantage is that since it stores bit information as charge which leaks;therfore information needs to be read and written again every few milliseconds.This is known as refreshing the memory and it requires extra circuitry,adding to the cost of system.
Which is faster, SRAM or DRAM
There are 2 types of RAM's: 1.Static ram(sram) 2.Dynamic ram(dram) There are some difference between them: 1.sram are faster than dram 2.sram are mostly made of bjt's were dram's are made of mosfet's
SRAM is faster than DRAM
dram is material gives sound and sram is the sound itself
DRAM (Dynamic RAM) requires that the data held be refreshed periodically, while SRAM (Static RAM) does not. This refresh rate makes DRAM a little slower than SRAM.
SRAM is static random access memory and DRAM is dynamic random access memory. DRAM requires the data to be refreshed periodically in order to keep the data. SRAM does not need to be refreshed as the transistors inside would continue to hold the data as long as the power supply.
sram and dram
SRAM is faster.Static RAM(SRAM) is faster. Dynamic RAM(DRAM) needs to be refreshed thousands of times per second while Static RAM does not need to be refreshed.
SRAM is faster and consumes less power than DRAM; however, because of this it is slightly more expensive.
DRAM has a lower price. Further details below: