PCI, 64-Bit and 66-MHz Benefits

Today, heavily loaded systems move about 90 MB/sec of data on the 133-MB/sec PCI bus, the difference being overhead. The majority of system vendors have implemented a 32-bit PCI bus at 33 MHz. We'll talk about implementing 64-bit PCI bus extensions and increasing the PCI clock to 66 MHz as a way of increasing system bandwidth and efficiency. These PCI changes will result in part in increasing overall system performance; however, other components like the OS and the CPU also play a major role in increasing system performance. Let's take a look at the benefits of implementing 64-bit and 66-MHz PCI technologies.

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