SRAM(Static RAM)
SRAM, or Static Random Access Memory, is RAM that, unlike DRAM, doesn't need to constantly be "refreshed". It is made uu of logical circuits (eg. Flip flops). This makes this type of memory more efficient (i.e., faster) than DRAM. This extra speed comes with a price however, so it is usually only used where speed is of the essence. Even though SRAM doesn't have to be constantly replenished, it also dissipates and is lost whenever the computer is powered off.
DRAM (Dynamic RAM):
It is RAM that needs to constantly be "refreshed". It is make up of capacitors. As the name implies, this type of memory is constantly changing (Dynamic). With DRAM, the information the computer is juggling is stored on capacitors. Unfortunately, capacitors can only retain this information for a short time. Therefore, the computer must continually replace this dissipating information with "fresh" copies.
This occurs thousands of times per second.
No comments:
Post a Comment