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DRAM (continued)

SDRAM (Synchronous Dynamic RAM)

Used in many personal computers

Fast and relatively inexpensive

Synchronized to the clock so that data can be sent to the CPU at each tick of the clock, increasing the number of instructions the processor can execute within a given time

DDR SDRAM (Double Data Rate SDRAM)

Transfers twice the amount of data per clock cycle compared to SDRAM

Capacity is up to 2 GB

RDRAM (Rambus Dynamic RAM)

Higher bandwidth than SDRAM

More expensive compared to SDRAM

Enhances the performance of applications that access large amounts of data through memory, i.e. real-time video and video editing

SRAM (Static RAM)

Uses transistors to store data

Because SRAM does not use capacitors, reading data from SRAM does not require recharging the capacitors. Therefore, it is faster than DRAM.

Holds fewer bits and costs more compared to DRAM of the same size

Used in the cache because it is fast and cache does not require a large memory capacity

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