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In buffered RAM, there is an additional register between the DRAM and the memory controller. It is also known as registered memory. This memory helps to place a less electrical load on the memory controller. It allows a single system to remain stable without using more memory modules than in a usual system.
Buffered RAM is used for high-end systems such as servers and systems that require a stable operating environment. It is rarely used on desktops and laptops. Sometimes, it is possible to recognize buffered memory in RAM as there are additional chips in the middle of the module.