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I always thought processor's FSB was the limit of how fast the RAM could be. However, while configuring a Lenovo laptop, I see options for RAM that's faster than the CPU's FSB
CPU = Intel® Core™ i5-560M Processor (2.66GHz, 3MB L3, 1066MHz FSB)
RAM = 8 GB PC3-10600 DDR3 SDRAM 1333MHz SODIMM Memory (2 DIMM)
Also known unchained is AKA asynchronous in the context of FSB: http://en.wikipedia.org/wiki/Front-side_bus
– AaronLS – 2012-05-17T23:10:53.313