If we consider the Intel Pentium 4 orthe new dual-core CPUs Intel Pentium D then the processor bus clockfrequency is 800 MHz or 1066.Given that the bus width we find thatthe processor bus bandwidth is 6.4 or 8.5 GB .From this it followsthat if the system uses a CPU with FSB 800 MHz, the single-channelmode for a balanced solution is sufficient to use DDR2-800 memory anddual-channel - DDR2-400.



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