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    Front-side bus - Wikipedia

    The bandwidth or maximum theoretical throughput of the front-side bus is determined by the product of the width of its data path, its clock frequency (cycles per second) and the number of data transfers it performs per clock cycle. For example, a 64-bit (8-byte) wide FSB operating at a frequency of 100 โ€ฆ See more

    The front-side bus (FSB) is a computer communication interface (bus) that was often used in Intel-chip-based computers during the 1990s and 2000s. The EV6 bus served the same โ€ฆ See more

    The term came into use by Intel Corporation about the time the Pentium Pro and Pentium II products were announced, in the โ€ฆ See more

    The front-side bus had the advantage of high flexibility and low cost when it was first designed. Simple symmetric multiprocessors See more

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    CPU
    The frequency at which a processor (CPU) operates is determined by applying a clock multiplier to the front-side bus (FSB) speed in some cases. For example, a processor running at 3200 MHz might be using a 400 MHz โ€ฆ See more

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  2. Intel® Coreโ„ข i3-330E Processor - Intel® Product Specifications

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    Whereas previous Intel processors such as the Core 2, Pentium D, Pentium 4, and so on, relied on the Front Side Bus (FSB) to access RAM, the new Core i7 processors do not. The Intel FSB which was used on the Core 2 motherboards allowed for 4 transfers per clock, which in marketing terms Intel referred to as their "Quad-Pumped Front Side Bus."
    Different CPU speeds are achieved by varying either the FSB frequency or the CPU multiplier, this is referred to as Overclocking or Underclocking . Setting an FSB speed is related directly to the speed grade of memory a system must use. The memory bus connects the northbridge and RAM, just as the front-side bus connects the CPU and northbridge.
    Setting an FSB speed is related directly to the speed grade of memory a system must use. The memory bus connects the northbridge and RAM, just as the front-side bus connects the CPU and northbridge. Often, these two buses must operate at the same frequency.
    Now, because this FSB was 64-bit wide, the end result was a bandwidth of just 10.6GB/s (1333x8). Here lies Intel's problem; their current 333MHz FSB supports a peak memory bandwidth of just 10.6GB/s, which is being exceeded by DDR2-800 memory operating in dual-channel mode.
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