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Hardware Prefetcher

Common Options : Enabled, Disabled

Quick Review

The processor has a hardware prefetcher that automatically analyzes its requirements and prefetches data and instructions from the memory into the Level 2 cache that are likely to be required in the near future. This reduces the latency associated with memory reads.

When enabled, the processor's hardware prefetcher will be enabled and allowed to automatically prefetch data and code for the processor.

When disabled, the processor's hardware prefetcher will be disabled.

If you are using a C1 stepping (or newer) of the Intel Pentium 4 or Intel Pentium 4 Xeon processor, it is recommended that you enable this BIOS feature so that the hardware prefetcher is enabled for maximum performance.

But if you are using an older version of the Intel Pentium 4 or Intel Pentium 4 Xeon processor, then you should disable this BIOS feature to circumvent the O37 bug which causes data corruption when the hardware prefetcher is operational.


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