Bona Fide Reviews has posted an article on Memory Bandwidth vs. Latency Timings
Memory Bandwidth vs. Latency Timings All memory is not created equal, nowadays you need to know which 'flavor' is best for an Intel or AMD PC if you expect the best performance back from your investment.Read more
When Intel released the i865PE/i875P dual channel core logic alongside the Intel Pentium 4C processors, the memory game changed forever. With a DDR memory controller now capable of running dual channel, the Pentium 4 was no longer to be bandwidth limited as it had been with the i845 series. Those single channel DDR chipsets, like the i845PE for instance, could only provide half the bandwidth required by the Pentium 4 processor due to its single channel memory controller.