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FBD is Fully-buffer DIMM (full cache module technology), which is a serial transmission technology that can improve memory capacity and transmission bandwidth. It is a new type of memory module developed by Intel based on DDR2 and DDR3. With the interconnect architecture, it can be paired with the current DDR2 memory chip or with the future DDR3 memory chip. FB-DIMMs can greatly increase system memory bandwidth and greatly increase the maximum memory capacity.

FB-DIMM technology was developed by Intel to solve the problem of memory performance on the overall performance of the system. Based on the existing technology, it achieves leap-forward performance improvement and low cost. In the entire computer system, memory can be said to be a key factor in determining the performance of the whole machine. There is a fast CPU, no good memory system to match it, and the CPU performance is excellent and can not be played. This situation is determined by the computer principle. The data required by the CPU during the operation is obtained from the memory. If the memory system cannot supply the data to the CPU in time, the CPU has to wait for a long time, the hardware resources. Idle, performance is naturally not available.

Compared with the existing ordinary DDR2 memory, FB-DIMM technology has great advantages: it can provide four times the bandwidth of ordinary memory at the same memory frequency, and the maximum memory capacity that can be supported also reaches ordinary memory. 24 times, the system can support up to 192GB of memory. The biggest feature of FB-DIMM is the use of existing DDR2 memory chips (later DDR3 memory chips will be used), but it converts parallel data into strings by means of a buffer chip AMB (Advanced Memory Buffer) on the memory PCB. The data stream is streamed and transmitted to the processor via a point-to-point high speed serial bus like PCI Express.