![]() As mentioned above SDRAM's have synchronous interface therefore they depend on the computer clock signals to perform operations. SDRAM is Single Data Rate meaning that SDRAM can accept one command and transfer one word of data per clock cycle. SDRAM stands for synchronous dynamic random access memory. All RAM's used in computers today have a synchronous interface meaning they wait for a clock signal before it can respond to clock signals. They differ in the way they operate and mainly in their operation speeds. There are mainly four types of RAM SD, DDR, DDR2 and DDR3. The processor sends and retrieves data from this cache, when this cache overflows data is sent to the RAM. The processor also has its own memory known as the L2 cache, the cache lies between the processor and the RAM. Or in other words RAM simply holds data for the processor. RAM is a kind of computer memory that temporarily stores information, improving your systems performance. SD, DDR, DDR2 and DDR3 are all different types of RAM (Random Access Memory).
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