As a newbie I am having a problem understanding the relationship between FSB speed and the speed of the memory. Dell is offering an Optiplex 320 with a FSB speed of 800 MHz. and the only option for memory is DDR2 Non-ECC SDRAM, 667 MHz. DIMMs. According the MEMORY FAQ at the beginning of this forum, SDRAM is “Synchronous DRAM” which means, “The clock speed of an SDRAM module is synchronous with the CPU bus.” How can the RAM be synchronous with the bus if it is running 667 MHz and the bus is running at 800 MHz.? What am I missing here?