MSI IB-945GC - Manual (Page 40)

3-8
BIOS Setup
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Ratio CMOS Setting
This setting controls the multiplier that is used to determine the internal
clock speed of the processor relative to the external or motherboard
clock speed.
Hardware Prefetcher
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 en-
abled, the processor’s hardware prefetcher will be enabled and allowed
to automatically prefetch data and code for the processor. When dis-
abled, the processor’s hardware prefetcher will be disabled.
Adjacent Cache Line Prefetch
The processor has a hardware adjacent cache line prefetch mecha-
nism that automatically fetches an extra 64-byte cache line whenever
the processor requests for a 64-byte cache line. This reduces cache
latency by making the next cache line immediately available if the pro-
cessor requires it as well. When enabled, the processor will retrieve the
currently requested cache line, as well as the subsequent cache line.
When disabled, the processor will only retrieve the currently requested
cache line.
Max CPUID Value Limit
The Max CPUID Value Limit BIOS feature allows you to circumvent
problems with older operating systems that do not support the Intel
Pentium 4 processor with Hyper-Threading Technology. When enabled,
the processor will limit the maximum CPUID input value to 03h when
queried, even if the processor supports a higher CPUID input value.
When disabled, the processor will return the actual maximum CPUID
input value of the processor when queried.
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