Which adds to the load on the memory controller. Despite this, the CPU, specifically the memory controller, has to regularly instruct the memory cells to perform a refresh cycle. This would be entirely unnecessary and confusing to users. Of course, computers don’t show you that your RAM constantly has the write the same data back to itself. Both will lose any data they hold if they lose power. Note: Both DRAM and SRAM are volatile memory. A DRAM cell is recharged by reading its contents and then writing back the same data. Dynamic RAM, however, needs each memory cell to be regularly recharged, or the data it holds will be lost, even with a constant power supply. It will keep the data it has stored without any further interaction, as long as there is a power supply. Static RAM simply needs to be written to. The difference is actually in how the memory cell works. The differences above, however, don’t really explain why one is considered static and the other dynamic. SRAM stands for Static Random Access Memory, while DRAM stands for Dynamic Random Access Memory. The high speed is excellent here as it keeps the CPU fed, but capacities are limited to keep CPUs affordable. The low cost and high density are helpful because you need gigabytes of it in modern computers. This gives rise to their two different uses. SRAM is significantly more expensive but much faster.
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