AMD Phenom memory controller

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POSTER: computer news   ||   AMD PHENOM MEMORY CONTROLLER	DATE:2007-12-02
We already talked about Some features of  Phenom processor memory controller. . But, the differences between the memory controller in Phenom  and K8 generation processor is not limited to the noted  in previous news data . One of the important features of Phenom memory controller is its ability to work independently from the processor frequency . Additionally, the memory controller has its own power channel . To Realize all these advantages user have to install Phenom processor in Socket AM2+ motherboard  . If the Phenom is placed  in Socket AM2, the memory operation mode will be limited to DDR2-800 although Phenom memory controller supports DDR2-1066. The processor memory frequency in  K8 generation is determined as a result of dividing the processor frequency by certain number. As result, the memory frequency was inconvenient for example, DDR2-733 instead of DDR2-800, and this has affected the memory system performance. With Brisbane processors and their 0.5 x step multiplier situation has only worsened. Here is An example in the following table: processor frequency , MHz 2000 2100 2200 2300 2400 2500 2600 2800 DDR2 800 800 700 733 767 800 714 743 800 DDR2 667 667 600 629 657 600 625 650 622 DDR2 533 500 525 489 511 533 500 520 509 To Tune the Phenom architecture , AMD company  decided to put an end to this unpleasant limitation. Now the memory frequency is set regardless of processor Clock frequency . So Memory modules in  system with  Socket AM2 + are working at their default frequencies and not under-clocked . The maximum supported memory frequency is independent of the default processor frequency  . Of course in reality all is more complicated , the simple of  Phenom  and early motherboard based on AMD 790FX chipset  shows some memory frequency problem  again. .... Related Products :

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